Display panel and display device

Abstract

The application provides a display panel and a display device, relates to the technical field of display devices, and aims to solve the technical problem of low overall transmittance of the display panel. The display panel comprises a light-emitting layer and a composite filter layer, and the composite filter layer is located on the light-emitting side of the light-emitting layer; 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 plurality of filter parts, a light-shielding part is formed between two adjacent filter parts, the orthographic projection of the filter part on the light-emitting layer covers the light-emitting area, and the orthographic projection of the light-shielding part on the light-emitting layer covers the non-light-emitting area; a light-transmitting part is arranged on the light-shielding 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 panel and the display device provided by the application can meet the use requirements of an under-screen optical device and improve the display effect of the display panel and the display device.

Description

TECHNICAL FIELD

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

[0002] Organic light emitting diode (OLED) as a current light-emitting device, because it has self-luminous, fast response, wide viewing angle and can be made on flexible substrate, etc. More and more is applied to high performance display field. In OLED display panel, COE technology can reduce the power consumption and thickness of display panel, and is widely used.

[0003] The COE technology includes a COE film layer covering the light-emitting layer. The COE film layer includes a color filter (CF) film layer and a black matrix (BM) film layer. The CF film layer is arranged in an array, and the CF film layer corresponds to the light-emitting area of the light-emitting layer. The BM film layer is located between adjacent CF film layers, and the BM film layer corresponds to the non-light-emitting area of the light-emitting layer. Among them, by designing the transmittance of the CF film layer, the reflectivity of the ambient light in the light-emitting area is reduced; by controlling the film thickness and optical density value of the BM film layer, the reflectivity of the ambient light in the non-light-emitting area is reduced, thereby the COE film layer as a whole reduces the reflectivity of the ambient light in the light-emitting layer, and the contrast of the display panel is improved.

[0004] However, the transmittance of external light in the display panel in the above technical solution is low, which affects the use effect of the under-screen optical device below the display panel. SUMMARY

[0005] In view of the above problems, the embodiments of the present application provide a display panel and a display device, which can meet the use requirements of the under-screen optical device and improve the display effect of the display panel and the display device.

[0006] In order to achieve the above purpose, the embodiments of the present application provide the following technical solutions:

[0007] The first aspect of the embodiments of the present application provides a display panel, which comprises a light-emitting layer and a composite filter layer, and the composite filter layer is located on the light-emitting side of the light-emitting layer.

[0008] The light-emitting layer comprises a plurality of light-emitting areas, and a non-light-emitting area is formed between two adjacent light-emitting areas.

[0009] The composite filter layer comprises a first filter layer and a second filter layer, the first filter layer comprises a plurality of filter parts, and a light shielding part is formed between two adjacent filter parts; a normal projection of the filter part on the light emitting layer covers the light emitting area, and a normal projection of the light shielding part on the light emitting layer covers the non-light emitting area.

[0010] A light transmitting part is arranged on the light shielding part.

[0011] A normal projection of the second filter layer on the light emitting layer covers a normal projection of the light transmitting part on the light emitting layer.

[0012] The display device provided by the embodiments of the present application comprises a light emitting layer and a composite filter layer, 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 filter part and a light shielding part, the light shielding part is provided with a light transmitting part, and a normal projection of the second filter layer on the first filter layer covers the light transmitting part. In this way, the light transmitting part and the second filter layer improve the defect of low transmittance of the light shielding part, improve the transmittance of the light projected through the light shielding part to the under-screen optical device, facilitate the integration of the display panel and the under-screen optical device, and meet the use requirement of the under-screen optical device for light amount. Since the second filter layer is arranged, the external light is incident for the first time, reflected in the screen, and then incident for the second time into the second filter layer. Compared with the case where only the light transmitting part is arranged, the transmittance of the external light can be reduced, thereby effectively reducing the reflectivity of the display panel, reducing the diffraction and reflection problems on the display panel, and improving the display effect of the display panel.

[0013] In an implementable embodiment, the light transmitting part comprises a light transmitting hole, and the light transmitting hole penetrates the light shielding part along a thickness direction of the light shielding part.

[0014] In this way, the light transmitting hole forms a light transmitting space, which is convenient to process and easy to implement.

[0015] In an implementable embodiment, the second filter layer fills at least part of the light transmitting hole along a depth direction of the light transmitting hole.

[0016] In an implementable embodiment, the second filter layer fills the entire light transmitting hole, or the second filter layer fills part of the light transmitting hole along the depth direction of the light transmitting hole.

[0017] In this way, the second filter layer is arranged in the same layer as the first filter layer, and the thickness of the display panel is reduced under the condition that the use requirement of the under-screen optical device is met.

[0018] In an implementable embodiment, a light absorbing member is arranged in the light transmitting hole, and at least part of an edge of a normal projection of the light absorbing member on the light emitting layer has a spacing from an edge of a normal projection of the light transmitting hole on the light emitting layer.

[0019] In this way, the light-absorbing member absorbs part of the diffracted light at the light-transmitting hole, thereby reducing the diffraction problem caused by the light-transmitting hole.

[0020] In an implementation, the second filter layer is stacked with the first filter layer.

[0021] In an implementation, the first filter layer is located on the side of the second filter layer close to the light-emitting layer.

[0022] In this way, the second filter layer is stacked with the first filter layer, which increases the area of the second filter layer covering the first filter layer, increases the filtering effect of the second filter layer, has good structural stability, improves the use effect of the under-screen optical device, and optimizes the display effect of the display panel.

[0023] In an implementation, the second filter layer is stacked with the first filter layer.

[0024] In an implementation, the second filter layer includes a color filter film layer.

[0025] In this way, the light-absorbing member absorbs part of the diffracted light at the light-transmitting hole, thereby reducing the diffraction problem caused by the light-transmitting hole.

[0026] In an implementation, the second filter layer is stacked with the first filter layer.

[0027] In an implementation, the second filter layer includes an insulating cover layer.

[0028] In this way, the second filter layer covers the entire first filter layer, which is convenient for manufacturing and processing. The second filter layer is an insulating cover layer, which allows all wavelengths of light to pass through, thereby avoiding the color problem of reflected light of the display panel.

[0029] In an implementation, the composite filter layer further includes a third filter layer, the third filter layer is located on the side of the second filter layer away from the light-emitting layer, and the orthographic projection of the third filter layer on the light-emitting layer covers the orthographic projection of the second filter layer on the light-emitting layer.

[0030] In an implementation, the third filter layer includes an anti-reflection and anti-fingerprint film layer.

[0031] In this way, the third filter layer can alleviate the color problem of reflected light caused by the addition of the second filter layer.

[0032] In an implementation, a projection of the third filter layer on the light-emitting layer covers the entire light-emitting layer.

[0033] In this way, the third filter layer is arranged in an entire layer, which can alleviate the color problem of reflected light of the display panel caused by the addition of the second filter layer from the entire display panel, and is convenient for processing and manufacturing.

[0034] In an implementation, an encapsulation layer and an adhesive layer are arranged between the second filter layer and the third filter layer, and the adhesive layer is arranged between the encapsulation layer and the second filter layer.

[0035] In this way, the second filter layer is encapsulated by the encapsulation layer and the adhesive layer, and the third filter layer covers the other side of the encapsulation layer, thereby protecting the first filter layer and the second filter layer, and being suitable for the structural requirements of the display panel.

[0036] A second aspect of the embodiment of the present application provides a display device, which comprises a display panel as described above and an under-screen optical device, and the under-screen optical device is located on the backlight side of the light-emitting layer of the display panel.

[0037] The display device provided by the embodiment of the present application comprises a display panel and an under-screen optical device. The display device comprises a light-emitting layer and a composite filter layer. 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-blocking part. The light-blocking part is provided with a light-transmitting part. The light-transmitting part corresponds to the under-screen optical device, and a projection of the second filter layer on the first filter layer covers the light-transmitting part. In this way, the light-transmitting part and the second filter layer are arranged to improve the defect of low transmittance of the light-blocking part, improve the transmittance of light projected to the under-screen optical device through the light-blocking part, facilitate the integration of the display panel and the under-screen optical device, and meet the use requirements of the under-screen optical device. Because the second filter layer is arranged, the external light is incident for the first time, is reflected in the display panel, and is incident for the second time into the second filter layer. Compared with the case where only the light-transmitting part is arranged, the transmittance of the external light can be reduced, thereby effectively reducing the reflectivity of the display panel, reducing the diffraction and reflection problems on the display panel, and improving the display effect of the display panel. The display device has the same beneficial effects, and the use effect of the display device is improved.

[0038] The structure of the present application and other purposes and beneficial effects thereof will be more apparent and understandable through the description of the preferred embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. Obviously, the accompanying 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 effort based on these drawings.

[0040] Figure 1 A structural schematic diagram of a display panel provided by an embodiment of the present application is shown in FIG. 1.

[0041] Figure 2 A partial enlarged view of A in FIG. 1 is shown in FIG. 2. Figure 1

[0042] Figure 3 A partial enlarged view of B in FIG. 1 is shown in FIG. 3. Figure 1

[0043] Figure 4 Another structural schematic diagram of a display panel provided by an embodiment of the present application is shown in FIG. 4.

[0044] Figure 5 Another structural schematic diagram of a display panel provided by an embodiment of the present application is shown in FIG. 5.

[0045] Figure 6 Another structural schematic diagram of a display panel provided by an embodiment of the present application is shown in FIG. 6.

[0046] Figure 7 Another structural schematic diagram of a display panel provided by an embodiment of the present application is shown in FIG. 7.

[0047] Figure 8 Another structural schematic diagram of a display panel provided by an embodiment of the present application is shown in FIG. 8.

[0048] Figure 9 Another structural schematic diagram of a display panel provided by an embodiment of the present application is shown in FIG. 9.

[0049] Figure 10 Another structural schematic diagram of a display panel provided by an embodiment of the present application is shown in FIG. 10.

[0050] Figure 11 Another structural schematic diagram of a display panel provided by an embodiment of the present application is shown in FIG. 11.

[0051] Figure 12 Another structural schematic diagram of a display panel provided by an embodiment of the present application is shown in FIG. 12.

[0052] Figure 13 Another structural schematic diagram of a display panel provided by an embodiment of the present application is shown in FIG. 13.

[0053] Figure 14 ​​Another structural schematic diagram of a display panel provided by an embodiment of the present application;

[0054] Figure 15 A structural schematic diagram of a display device provided by an embodiment of the present application.

[0055] Legend of reference signs:

[0056] 10 - display device;

[0057] 20 - display panel;

[0058] 30 - under-screen optical device;

[0059] 40 - measured object;

[0060] 200 - substrate;

[0061] 210 - driving array layer;

[0062] 220 - light-emitting layer; 221 - light-emitting region; 222 - non-light-emitting region;

[0063] 230 - thin film encapsulation layer;

[0064] 240 - touch module layer;

[0065] 250 - composite filter layer; 251 - first filter layer; 2511 - filter part; 2512 - light-blocking part; 25121 - light-transmitting part; 25122 - light-absorbing part; 252 - second filter layer; 253 - third filter layer;

[0066] 260 - adhesive layer;

[0067] 270 - encapsulation layer;

[0068] 310 - once-reflected external light; 311 - once-transmitted external light; 312 - once-reflected external light; 320 - twice-reflected external light; 321 - twice-transmitted external light; 322 - thrice-reflected external light; 330 - light emitted by the display panel. DETAILED DESCRIPTION

[0069] In the related art, the CF film layer of the COE film layer has high transmittance for red light, green light and blue light, and has large absorption for other light bands. The light band of the light emitted by the light emitting area of the light emitting layer corresponds to the transmittance light band of the CF film layer, so the CF film layer has little influence on the intensity of the light emitted by the light emitting area. However, the ambient light is generally visible light including the entire light band or light with a wide band spectrum, and most of the light bands of the incident ambient light and the ambient light reflected by the light emitting area of the light emitting layer can be filtered by the CF film layer, so the CF film layer reduces the reflectivity of the ambient light on the light emitting area of the light emitting layer. The BM film layer has strong absorption for light, and most of the incident ambient light and the ambient light reflected by the non-light emitting area of the light emitting layer are absorbed by the BM film layer, so the BM film layer reduces the reflectivity of the ambient light on the non-light emitting area. The COE film layer reduces the reflectivity of the ambient light on the light emitting layer as a whole, thereby improving the contrast of the display panel. However, since the entire space of the non-light emitting area of the light emitting layer is blocked by the BM film layer, the overall transmittance of the display panel is reduced, which causes the under-screen optical device such as an under-screen optical fingerprint recognizer or an under-screen camera to be unable to receive sufficient light, thereby affecting the use effect of the under-screen optical device and limiting the effective integration of the under-screen optical device and the display panel based on the COE technology. The related art generally improves the transmittance by opening holes in the BM film layer to ensure the light amount of the under-screen optical device. However, such a setting affects the optical properties of the display panel, and causes problems such as high reflectivity, low integral black level, high diffraction level and the like.

[0070] To solve the above technical problems, the display panel and the display device provided by the embodiments of the present application include a light emitting layer and a composite light filtering layer. The light emitting layer includes a light emitting area and a non-light emitting area. The composite light filtering layer includes a first light filtering layer and a second light filtering layer. The first light filtering layer includes a light filtering part and a light shielding part. The light shielding part is provided with a light transmitting part. The second light filtering layer is in orthographic projection on the first light filtering layer and covers the light transmitting part. In this way, the light transmitting part and the second light filtering layer improve the defect of low transmittance of the light shielding part, improve the transmittance of the light projected to the under-screen optical device through the light shielding part, facilitate the integration of the display panel and the under-screen optical device, and meet the use requirements of the light amount of the under-screen optical device. Since the second light filtering layer is provided, the external light is incident for the first time, is reflected in the screen, and is incident for the second time into the second light filtering layer. Compared with the case where only the light transmitting part is provided, the transmittance of the external light can be reduced, thereby effectively reducing the reflectivity of the display panel and reducing the problems of diffraction and reflection on the display panel, and improving the use effect of the display panel. The display device includes the above display panel and the under-screen optical device, has the same beneficial effects, and improves the use effect of the display device.

[0071] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. 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 some, but not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0072] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application; Figure 2 for Figure 1 Enlarged view of a portion at point A; Figure 3 for Figure 1 A magnified view of section B; Figure 4 Another structural schematic diagram of the display panel provided in an embodiment of this application; Figure 5 Another structural schematic diagram of the display panel provided in an embodiment of this application; Figure 6 Another structural schematic diagram of the display panel provided in an embodiment of this application; Figure 7 Another structural schematic diagram of the display panel provided in an embodiment of this application; Figure 8 Another structural schematic diagram of the display panel provided in an embodiment of this application; Figure 9 Another structural schematic diagram of the display panel provided in an embodiment of this application; Figure 10 Another structural schematic diagram of the display panel provided in an embodiment of this application; Figure 11 Another structural schematic diagram of the display panel provided in an embodiment of this application; Figure 12 Another structural schematic diagram of the display panel provided in an embodiment of this application; Figure 13 Another structural schematic diagram of the display panel provided in an embodiment of this application; Figure 14 This is a schematic diagram of another structure of the display panel provided in an embodiment of this application.

[0073] Reference Figures 1-14 As shown, in a first aspect, embodiments of this application provide a display panel 20, which is disposed on and used in conjunction with an under-display optical device 30. The display panel includes a light-emitting layer 220 and a composite filter layer 250, wherein the composite filter layer 250 is located on the light-emitting side of the light-emitting layer 220, and the under-display optical device 30 is located on the backlight side of the light-emitting layer 220.

[0074] The light-emitting layer 220 includes multiple light-emitting areas 221, and a non-light-emitting area 222 is formed between two adjacent light-emitting areas 221.

[0075] 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, and a light-shielding portion 2512 is formed between two adjacent filter portions 2511. The orthographic projection of the filter portion 2511 onto the light-emitting layer 220 covers the light-emitting area 221, and the orthographic projection of the light-shielding portion 2512 onto the light-emitting layer 220 covers the non-light-emitting area 222. It is understood that "coverage" in this application can refer to partial coverage or complete coverage.

[0076] The light-shielding part 2512 is provided with a light-transmitting part 25121, which corresponds to the under-screen optical device 30.

[0077] The orthographic projection of the second filter layer 252 onto the light-emitting layer 220 covers the orthographic projection of the light-transmitting portion 25121 onto the light-emitting layer 220. In some embodiments of this application, the orthographic projection of the light-transmitting portion 25121 onto the light-emitting layer 220 is entirely or partially located within the orthographic projection of the second filter layer 252 onto the first filter layer 251. The following embodiments are described with the structure in which the light-transmitting portion 25121 is entirely located within the orthographic projection of the second filter layer 252 onto the first filter layer 251.

[0078] like Figures 1-13 As shown, an under-display optical device 30 is disposed on the backlight side of the display panel 20. 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 panel layer 240 (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.

[0079] The driving array layer 210 is located on the side of the substrate 200 away from the under-display optical device 30, and the driving array layer 210 includes a plurality of driving transistors (Thin-Film Transistors, or TFTs) arranged in an array.

[0080] The light-emitting layer 220 includes non-light-emitting regions 222 and multiple light-emitting regions 221. The number of light-emitting regions 221 is equal to the number of driving transistors, and each of the multiple light-emitting regions 221 corresponds to one of the multiple driving transistors. Non-light-emitting regions 222 are located between adjacent light-emitting regions 221. Independent non-light-emitting regions 222 can be provided between adjacent light-emitting regions 221, and multiple non-light-emitting regions 222 can be arranged in an array; alternatively, the non-light-emitting regions 222 between adjacent light-emitting regions 221 can be interconnected to form a single structure. The embodiments of this application are mainly described using the latter approach.

[0081] Specifically, the light emitting region 221 is generally provided with a light emitting stack layer, which can 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 arranged in sequence. The driving transistor in the driving array layer 210 is connected with the anode layer or the cathode, and provides an electrical signal for the light emitting stack layer. When the electrical signal is written into the light emitting stack layer, the holes of the anode layer are transmitted to the organic light emitting layer through the hole transport layer and the hole injection layer, and the electrons of the cathode layer are transmitted to the organic light emitting layer through the electron transport layer and the electron injection layer. The electrons and holes combine 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, which is usually made of black light-absorbing resin material and is used to block the mixed light of the adjacent two light emitting regions 221. In some embodiments, the cathode layer and the anode layer in the light emitting region 221 can also extend to the non-light emitting region 222.

[0082] The thin film encapsulation layer 230 is located on the side of the light emitting layer 220 away from the under-screen optical device 30, and can encapsulate the light emitting layer 220, the driving array layer 210 and the substrate 200. The thin film encapsulation layer 230 includes organic layers and inorganic layers arranged in layers, which 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, and ensure the structural stability and service life of the light emitting layer 220 or the driving array layer 210.

[0083] The touch module layer 240 is located on the side of the thin film encapsulation layer 230 away from the under-screen optical device 30, and the touch module layer 240 is provided with a plurality of touch elements arranged in an array to realize the touch function of the display panel.

[0084] The first filter layer 251 includes a filter part 2511 and a light shielding part 2512. Corresponding to the structure of the light emitting layer 220, a plurality of filter parts 2511 are arranged in an array, and the light shielding parts 2512 are located between adjacent filter parts 2511 and are connected to form an integral structure.

[0085] Specifically, the filter part 2511 can include a CF film layer, and the light shielding part 2512 can include a BM film layer. The CF film layer has high transmittance to red light, green light and blue light, and has large absorption to other bands of light, which is used to improve the purity of the light emitting color of the display panel. The BM film layer has strong absorption to light, which is used to reduce the mixed light between adjacent light emitting regions and absorb part of the reflected light on the light emitting layer.

[0086] Reference Figure 2As shown, the light-transmitting portion 25121 in this embodiment can include a light-transmitting hole that penetrates the light-blocking portion 2512 in the thickness direction of the light-blocking portion 2512. The position, size, and shape of the light-transmitting hole are set according to the under-screen optical device 30, and this embodiment does not make specific limitations on this. For example, the position of the light-transmitting hole can be at the center of the light-blocking portion 2512 or at the edge of the light-blocking portion 2512. The shape of the light-transmitting hole can include a circle, a square, or a polygon, etc. In this way, the light-transmitting hole is used to form a light-transmitting space in the light-blocking portion 2512, which has the effects of facilitating processing and being easy to implement.

[0087] In one possible implementation, referring to Figure 14 As shown, the light-transmitting hole is provided with a light-absorbing member 25122, and at least part of the edge of the orthographic projection of the light-absorbing member 25122 on the light-emitting layer 220 has a spacing from the edge of the orthographic projection of the light-transmitting hole on the light-emitting layer 220.

[0088] The material of the light-absorbing member 25122 can include a black light-absorbing resin material. The light-absorbing member 25122 can be made in the shape of a cubic particle, and the cross-sectional shape of the light-absorbing member 25122 in the extension direction of the light-emitting layer can be a square with a side length of 1-5 microns. Of course, in actual use, the light-absorbing member 25122 can also be in the shape of a cylinder, a cone, etc., and this embodiment does not make limitations on the structure thereof. The light-absorbing member 25122 can be arranged at the inner wall of the light-transmitting hole. Of course, in actual use, the light-absorbing member 25122 can also be arranged at the center of the light-transmitting hole, and this embodiment does not make limitations on the specific position thereof. It should be noted that the light-absorbing members 25122 in the plurality of light-transmitting holes are not uniformly arranged.

[0089] In this way, the light-absorbing member 25122 is used to absorb the diffracted light at the light-transmitting hole, which can alleviate the diffraction problem that can be caused by the light-transmitting hole, improve the influence of the diffracted light on the under-screen optical device 30, and optimize the display effect of the display panel.

[0090] It can be understood that the embodiments of the present application are only described by way of example Figure 14 The second filter layer 252 fills the light-transmitting hole and covers the side of the first filter layer 251 that is away from the light-emitting layer 220. Figure 14 As shown, this is only one setting mode of the second filter layer 252. In other setting modes of the second filter layer, the above-mentioned embodiments of arranging the light-absorbing member 25122 in the light-transmitting hole are also applicable, and all can play a role in reducing the diffraction problem at the light-transmitting hole.

[0091] Based on the structure of the light-transmitting portion, in this embodiment, the second filter layer 252 can include the following three setting modes:

[0092] In a first implementable implementation of the second filter layer 252, the second filter layer 252 fills at least part of the light transmission hole in the depth direction of the light transmission hole.

[0093] Referring to Figure 1 , the second filter layer 252 can fill the entire light transmission hole. Alternatively, referring to Figure 4 , the second filter layer 252 fills part of the light transmission hole in the depth direction of the light transmission hole, and the remaining part of the light transmission hole is filled with a light transmission piece for supporting the light transmission hole.

[0094] It can be understood that the part of the light transmission hole filled by the second filter layer 252 can be the side of the light transmission hole close to the under-screen optical device 30, or the side away from the under-screen optical device 30.

[0095] The second filter layer 252 has a filtering effect on external light, and the second filter layer 252 can include an insulating over coating (OC) layer, which has a filtering effect on light of all wavebands. The material of the black insulating over coating layer can include an organic material, and the forming method can include a coating process. Exemplarily, the optical transmittance range of the black insulating over coating layer can satisfy: 60%≤optical transmittance≤90%.

[0096] Alternatively, the second filter layer 252 can include a color filter film layer, which allows only light of a specific waveband to pass through and can filter and absorb light of another specific waveband. The material of the color filter film layer can include an organic material, and the forming method can include coating forming or printing forming. Exemplarily, the light waveband recognizable by the under-screen optical device 30 is green and red, and the color filter film layer can be made of a material that allows only green and red waveband light to pass through, thereby absorbing and filtering blue waveband light. As shown in Figures 1-3 , the solid arrow represents red waveband light, the dashed arrow represents green waveband light, and the dotted arrow represents blue waveband light. It can be seen that when external light passes through the second filter layer 252, the red and green waveband light can pass through the second filter layer 252, and the blue waveband light is absorbed.

[0097] In this way, as shown in Figure 2 , the light 330 emitted by the display panel propagates to the measured object 40, and the light 330 emitted by the display panel forms a first incident external light 310 incident on the display panel 20 after being reflected by the measured object 40.

[0098] In combination with Figure 3As shown in the left half of the left part of the light path and the right half of the light path, the first incident external light 310 passes through the second filter layer 252 and the light-transmitting portion 25121 for the first time. In this first filtering process, part of the first incident external light 310 is reflected by the second filter layer 252, and the reflected light exits the display panel 20 as the first reflected external light 312. Part of the first incident external light 310 is absorbed by the second filter layer 252. Another part of the first incident external light 310 transmits through the second filter layer 252 and propagates to the under-screen optical device 30 as the first transmitted external light 311.

[0099] Part of the first transmitted external light 311 is incident on the under-screen optical device 30 as the under-screen optical device 30 incident light, satisfying the use requirement of the under-screen optical device 30 incident light amount. Another part of the first transmitted external light 311 is reflected by the internal structure layer of the display panel 20 or the under-screen optical device 30, forming the second reflected external light 320.

[0100] The second 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 this second filtering process, part of the second reflected external light 320 is reflected by the second filter layer 252, and the reflected light forms the third reflected external light 322 and is folded back into the display panel 20 again; part of the second reflected external light 320 is absorbed by the second filter layer 252; and another part of the second reflected external light 320 transmits through the second filter layer 252 and exits the display panel 20 as the second transmitted external light 321.

[0101] The display panel 20 provided by the embodiment of the present application is configured such that the external light passes through the second filter layer 252 and the light-transmitting portion 25121 twice. In the above two filtering processes, the second filter layer 252 can filter part of the wave bands of the external light, retain the transmittance of the wave bands that can be sensed by the under-screen optical device 30, and thus satisfy the use requirement of the under-screen optical device 30 incident light amount. In addition, the second filter layer 252 can reduce the intensity of the light reflected from the inside of the display panel 20 to the outside, reduce the problem of excessively high reflectivity and diffraction, and optimize the display effect of the display panel 20. Further, when the second filter layer 252 includes a color filter film layer, the color filter film layer allows only light of a specific wave band to transmit, and the specific wave band can be the wave band that can be sensed by the under-screen optical device. Therefore, the transmittance of the wave band that can be sensed can be increased, and the use effect of the under-screen optical device 30 can be improved.

[0102] In addition, in the embodiment, the second filter layer 252 is located in the light-transmitting hole, and the second filter layer 252 is arranged in the same layer as the first filter layer 251, which helps to reduce the overall thickness of the display panel 20.

[0103] In the second achievable embodiment of the second filter layer 252, refer to Figures 5-7 As shown, the second filter layer 252 can be stacked with the first filter layer 251.

[0104] It should be noted that in this embodiment, the first filter layer 251 may be located on the side of the second filter layer 252 closer to the light-emitting layer 220. Alternatively, in other feasible embodiments, the second filter layer 252 may also be located on the side of the first filter layer 251 closer to the light-emitting layer 220. This embodiment is mainly described with the first filter layer 251 located on the side of the second filter layer 252 closer to the light-emitting layer 220.

[0105] In both the second filter layer 252 and the first filter layer 251 described above, the path of external light inside the display panel 20 and its interaction with the second filter layer 252 are similar to those in the first possible implementation of the second filter layer, and have the same beneficial effects, which will not be elaborated here.

[0106] Furthermore, in this embodiment, the second filter layer 252 is stacked with the first filter layer 251. The second filter layer 252 is not limited to covering only the light-transmitting portion 25121 of the first filter layer 251. It can increase the area of ​​the second filter layer 252 covering the first filter layer 251, increase the filtering effect of the second filter layer 252, have good structural stability, improve the performance of the under-screen optical device 30, and optimize the display effect of the display panel 20.

[0107] In the stacking of the second filter layer 252 and the first filter layer 251, the stacking method can include the following three:

[0108] In the first feasible implementation, refer to Figure 5 As shown, the orthographic projection of the second filter layer 252 onto the first filter layer 251 covers the light-transmitting portion 25121. The second filter layer 252 is located at the end of the light-transmitting hole that is away from the light-emitting layer 220, and the second filter layer 252 blocks the light-transmitting hole.

[0109] In this embodiment, a second filter layer 252 is stacked over the light-transmitting portion 25121 of the first filter layer 251, and the second filter layer 252 is located outside the light-transmitting portion 25121 of the first filter layer 251, allowing it to receive more external light. This increased external light intensity ensures the filtering effect of the second filter layer 252 on the external light incident on it, enabling the under-display optical device 30 to receive sufficient incident light of the sensitive wavelength range. Furthermore, it reduces reflected light from the display panel, alleviates diffraction problems on the display panel, and optimizes the display effect of the display panel 20.

[0110] In a second implementable embodiment, referring to FIG. 2B, the orthographic 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 away from the light-emitting layer 220. Figure 6 In this embodiment, based on the fact that the second filter layer 252 can cover the light-transmitting portion 25121 of the first filter layer 251 while covering 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 the first implementable embodiment described above, and thus will not be repeated here.

[0111] In a third implementable embodiment, referring to FIG. 2C, the orthographic projection of the second filter layer 252 on the first filter layer 251 covers the entire first filter layer 251.

[0112] Figure 7 In this embodiment, based on the fact that the second filter layer 252 can cover the entire first filter layer 251, more external light can be incident on the second filter layer 252, which has the same beneficial effects as the first implementable embodiment described above, and thus will not be repeated here.

[0113] It should be noted that, based on the fact that the light-filtering portion 2511 of the first filter layer 251 has high transmittance for red, green, and blue light, and has high absorption for other wavelengths, when the second filter layer 252 is arranged above the entire first filter layer 251, the second filter layer 252 needs to avoid using a color filter film layer to prevent the second filter layer 252 from affecting the transmittance of the first filter layer 251 for specific wavelengths. The second filter layer 252 can include an insulating cover layer, which can have a filtering effect for all wavelengths of light, only reducing the transmittance of all wavelengths of light, but not filtering out specific wavelengths of light, and thus will not affect the filtering effect of the light-filtering portion 2511 of the first filter layer 251.

[0114] In a third implementable embodiment of the second filter layer 252, referring to FIG. 2D, part of the second filter layer 252 is filled in at least part of the light-transmitting hole, and the remaining part of the second filter layer 252 covers the side of the first filter layer 251 away from the light-emitting layer 220.

[0115] In this embodiment, the second filter layer 252 adopts a combination of the first and second implementable embodiments of the second filter layer. Figures 8-13 In this embodiment, the second filter layer 252 adopts a combination of the first and second implementable embodiments of the second filter layer.

[0116] For example, as shown in FIG. 2E, the second filter layer 252 is arranged on the first filter layer 251, and the orthographic projection of the second filter layer 252 on the first filter layer 251 covers the entire first filter layer 251.

[0117] Figure 8 ​​As shown in FIG. 6, a part of the second filter layer 252 is laminated and covers the side of the light shielding part 2512 away from the light emitting layer 220, and another part of the second filter layer 252 fills the inside of the light transmitting hole away from the light emitting layer 220, and the two parts of the second filter layer 252 are connected as one body. Figure 9 As shown in FIG. 6, a part of the second filter layer 252 is laminated and covers the side of the light shielding part 2512 away from the light emitting layer 220, and another part of the second filter layer 252 fills the inside of the light transmitting hole away from the light emitting layer 220, and the two parts of the second filter layer 252 are connected as one body.

[0118] As shown in FIG. 6, a part of the second filter layer 252 is laminated and covers the side of the light shielding part 2512 away from the light emitting layer 220, and another part of the second filter layer 252 fills the inside of the light transmitting hole away from the light emitting layer 220, and the two parts of the second filter layer 252 are connected as one body. Figure 10 As shown in FIG. 6, a part of the second filter layer 252 is laminated and covers the side of the light shielding part 2512 away from the light emitting layer 220, and another part of the second filter layer 252 fills the inside of the light transmitting hole away from the light emitting layer 220, and the two parts of the second filter layer 252 are connected as one body. Figure 11 As shown in FIG. 6, a part of the second filter layer 252 is laminated and covers the side of the light shielding part 2512 away from the light emitting layer 220, and another part of the second filter layer 252 fills the inside of the light transmitting hole away from the light emitting layer 220, and the two parts of the second filter layer 252 are connected as one body.

[0119] As shown in FIG. 6, a part of the second filter layer 252 is laminated and covers the side of the light shielding part 2512 away from the light emitting layer 220, and another part of the second filter layer 252 fills the inside of the light transmitting hole away from the light emitting layer 220, and the two parts of the second filter layer 252 are connected as one body. Figure 12 As shown in FIG. 6, a part of the second filter layer 252 is laminated and covers the side of the light shielding part 2512 away from the light emitting layer 220, and another part of the second filter layer 252 fills the inside of the light transmitting hole away from the light emitting layer 220, and the two parts of the second filter layer 252 are connected as one body. Figure 13 As shown in FIG. 6, a part of the second filter layer 252 is laminated and covers the side of the light shielding part 2512 away from the light emitting layer 220, and another part of the second filter layer 252 fills the inside of the light transmitting hole away from the light emitting layer 220, and the two parts of the second filter layer 252 are connected as one body.

[0120] As shown in FIG. 6, a part of the second filter layer 252 is laminated and covers the side of the light shielding part 2512 away from the light emitting layer 220, and another part of the second filter layer 252 fills the inside of the light transmitting hole away from the light emitting layer 220, and the two parts of the second filter layer 252 are connected as one body.

[0121] As shown in FIG. 6, a part of the second filter layer 252 is laminated and covers the side of the light shielding part 2512 away from the light emitting layer 220, and another part of the second filter layer 252 fills the inside of the light transmitting hole away from the light emitting layer 220, and the two parts of the second filter layer 252 are connected as one body.

[0122] In an implementable embodiment, the composite filter layer 250 further comprises a third filter layer 253, the third filter layer 253 is located on the side of the second filter layer 252 away from the light-emitting layer 220, and the orthographic projection of the third filter layer 253 on the light-emitting layer 220 covers the orthographic projection of the second filter layer 252 on the light-emitting layer 220.

[0123] It should be noted that the third filter layer 253 can comprise an anti-reflection (AR) film layer, an anti-fingerprint (AF) film layer, or both are stacked in the direction away from the light-emitting layer 220. In actual use, one of the above-mentioned limitations can be selected, and the present embodiment does not limit this. The materials of the anti-reflection film layer and the anti-fingerprint film layer can include organic materials or inorganic materials, and the forming method can include a spray forming process.

[0124] In the present embodiment, in combination with Figure 3 As shown in FIG. 6, based on the second filter layer 252 comprising a color filter film layer, it only allows specific wavelength light rays recognized by the under-screen optical device 30 to pass through, and filters and absorbs light rays of another specific wavelength. When the once-reflected external light ray 312 and the twice-reflected external light ray 320 are emitted to the display panel 20, the color phase problem of not being able to display the color phase of the design requirement color occurs in the display panel 20 due to the lack of light rays of another specific wavelength.

[0125] The third filter layer 253 is arranged at the position where the color phase problem occurs in the second filter layer 252. According to the light matching principle, the third filter layer 253 filters out light rays of other specific wavelengths that affect the color phase problem, or supplements the missing color phase through color addition in the third filter layer 253, to alleviate the reflected light color phase problem caused by the addition of the second filter layer 252.

[0126] In an implementable embodiment, referring to Figures 1-13 As shown in FIG. 7, the 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 arranged in an entire layer, which can balance the reflected light color phase problem caused by the addition of the second filter layer 252 from the side of the entire light-emitting layer, and is convenient for processing and manufacturing.

[0127] In an implementable embodiment, referring to Figures 1-13 As shown in FIG. 8, the encapsulation layer 270 and the adhesive layer 260 are arranged between the second filter layer 252 and the third filter layer 253, and the adhesive layer 260 is located between the encapsulation layer 270 and the second filter layer 252.

[0128] The bonding layer 260 can include an optically clear adhesive (OCA).

[0129] The encapsulation layer 270 can include a cover glass (CG), a cover filter (CF), or both, which can be laminated, and can provide a protective effect for the display panel.

[0130] In this embodiment, the second filter layer 252 is encapsulated by the encapsulation layer 270 and the bonding layer 260, and the third filter layer 253 covers the other side of the encapsulation layer 270, thereby protecting the first filter layer 251 and the second filter layer 252 of the composite filter layer 250, which is suitable for the structural requirements of the display panel 20.

[0131] Figure 15 A structural schematic diagram of a display device provided by the embodiments of the present application is shown.

[0132] Referring to Figure 15 On the basis of the above embodiments, in a second aspect, the embodiments of the present application provide a display device 10, which includes an under-screen optical device 30 and the above-mentioned display panel 20, and the under-screen optical device 30 is located on the backlight side of the light-emitting layer 220 of the display panel 20.

[0133] It should be noted that the under-screen optical device 30 includes an under-screen optical fingerprint recognizer, an under-screen camera, an under-screen face recognizer, and an under-screen distance sensor, etc.

[0134] The display device can be a mobile or fixed terminal of 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, etc.

[0135] The display device provided by the embodiment of the present application comprises a display panel 20 and an under-screen optical device 30, the display panel is provided with a light-transmitting part 25121 and a second filter layer 252, the defect of low transmittance of the light-blocking part 2512 is improved, the transmittance of the light projected to the under-screen optical device 30 through the light-blocking part 2512 is improved, the integration of the display panel 20 and the under-screen optical device 30 is facilitated, and the use requirement of the light quantity of the under-screen optical device 30 is met. Since the second filter layer 252 is arranged, the external light enters the second filter layer 252 after first incidence and in-screen reflection, compared with the case where only the light-transmitting part 25121 is arranged, the transmittance of the external light can be reduced, so that the reflectivity of the display panel 20 is effectively reduced, the diffraction and reflection problems on the display panel are also reduced, and the use effect of the display panel is improved. The display device 10 has the same beneficial effects, and the use effect of the display device is improved.

[0136] In the description of the embodiments of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0137] In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified and limited.

[0138] The terms "first", "second", "third", "fourth" and the like (if any) in the description of the present application and claims and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0139] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized by, The backlight side of the display panel is provided with an under-screen optical device; the display panel comprises a light-emitting layer and a composite light filter layer, and the composite light filter layer is located on the light-out 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 two adjacent light-emitting areas; The composite light filter layer comprises a first light filter layer and a second light filter layer, the first light filter layer comprises a plurality of light filter parts, a light shielding part is formed between two adjacent light filter parts, the orthographic projection of the light filter part on the light-emitting layer covers the light-emitting area, and the orthographic projection of the light shielding part on the light-emitting layer covers the non-light-emitting area; The light shielding part is provided with a light transmission part; The second light filter layer comprises a color filter film layer; The orthographic projection of the second light filter layer on the light-emitting layer covers the orthographic projection of the light transmission part on the light-emitting layer; The light transmission part comprises a light transmission hole, and the light transmission hole is provided with a light absorbing part, and at least part of the edge of the orthographic projection of the light absorbing part on the light-emitting layer has a spacing with the edge of the orthographic projection of the light transmission hole on the light-emitting layer.

2. The display panel of claim 1, wherein, The light transmission hole penetrates the light shielding part along the thickness direction of the light shielding part.

3. The display panel of claim 2, wherein, The second light filter layer fills at least part of the light transmission hole along the depth direction of the light transmission hole.

4. The display panel of claim 3, wherein, The second light filter layer fills the entire light transmission hole, or the second light filter layer fills part of the light transmission hole along the depth direction of the light transmission hole.

5. The display panel according to any one of claims 1-4, characterized in that, The second light filter layer is stacked with the first light filter layer.

6. The display panel of claim 5, wherein, The first light filter layer is located on the side of the second light filter layer close to the light-emitting layer.

7. The display panel of claim 5, wherein, The orthographic projection of the second light filter layer on the first light filter layer covers the light shielding part.

8. The display panel of claim 5, wherein, The orthographic projection of the second light filter layer on the first light filter layer covers the entire first light filter layer.

9. The display panel of claim 8, wherein, The second light filter layer comprises an insulating cover layer.

10. The display panel of claim 7, wherein, The composite light filter layer further comprises a third light filter layer, the third light filter layer is located on the side of the second light filter layer away from the light-emitting layer, and the orthographic projection of the third light filter layer on the light-emitting layer covers the orthographic projection of the second light filter layer on the light-emitting layer.

11. The display panel of claim 10, wherein, The third light filter layer comprises an anti-reflection and anti-fingerprint film layer.

12. The display panel of claim 11, wherein, The orthographic projection of the third light filter layer on the light-emitting layer covers the entire light-emitting layer.

13. The display panel of claim 10, wherein, An encapsulation layer and an adhesive layer are arranged between the second light filter layer and the third light filter layer, and the adhesive layer is located between the encapsulation layer and the second light filter layer.

14. A display device comprising: The display panel comprises an under-screen optical device and any one of claims 1-13, and the under-screen optical device is located on the backlight side of the light-emitting layer of the display panel.

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