Display panel and display equipment

Abstract

The invention relates to a display panel and a display device. The display panel comprises a substrate; the light-emitting structure layer is arranged on the substrate; the black matrix layer is arranged on the side, away from the substrate, of the light-emitting structure layer and provided with a first opening corresponding to the light-emitting area of the light-emitting structure layer; the color cast regulation and control layer is arranged on the side, away from the substrate, of the black matrix layer, and the opening of the black matrix layer is filled with the color cast regulation and control layer; wherein the extinction coefficient K of the color cast regulation and control layer ranges from 0 to 0.0001, and the refractive index N of the color cast regulation and control layer ranges from 1.35 to 1.45. Compared with an existing COE technology, the display panel has the advantages that the manufacturing process MASK and CF material cost is reduced, and the visual angle color cast can reach the level equivalent to that of POL.

Description

Technical Field

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

[0002] COE technology, the full name is Color Filter On Encapsulation, that is, after the AMOLED (active matrix organic light-emitting diode) completes the thin film encapsulation (TFE), after the Color Filter process, the R / G / B color film (CF) is deposited on the R / G / B pixels and separated by the black matrix (BM). The purpose is to remove the polarizer (POL) on the current OLED screen. It is the only depolarizer technology on the market. Compared with the traditional polarizer technology, COE technology can lower the driving current of the OLED screen while keeping the screen viewing brightness unchanged, which can not only reduce power consumption, but also extend the service life of the OLED screen. However, compared with POL technology, COE technology adds an additional BM+CF process. On the one hand, the MASK cost is increased, and the CF material cost is high, so there is a problem that the cost of COE products is relatively expensive compared to POL products; on the other hand, there is a problem that the CF transmittance spectrum and the OLED device spectrum are matched, resulting in a large difference in the color bias of COE products and POL products. Summary of the invention

[0003] Based on this, it is necessary to provide a new type of depolarizing film display panel and display device to address the above-mentioned technical problems existing in the prior art. On the one hand, it can reduce the cost of process MASK and CF materials compared with the existing COE technology. On the other hand, through material selection and structural design, the viewing angle polarization can reach a level comparable to that of POL.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A display panel, comprising:

[0006] substrate;

[0007] A light-emitting structure layer, wherein the light-emitting structure layer is arranged on the substrate;

[0008] A black matrix layer, which is disposed on a side of the light emitting structure layer away from the substrate and has a first opening corresponding to a light emitting area of ​​the light emitting structure layer;

[0009] A color deviation regulating layer, which is disposed on a side of the black matrix layer away from the substrate and fills the openings of the black matrix layer;

[0010] Among them, the extinction coefficient K of the color deviation regulating layer is between 0 and 0.0001, and the refractive index N is between 1.35 and 1.45.

[0011] The display panel of the present invention has a novel structure. Compared with conventional COE products, the CF (color glue) material is removed and directly replaced with an improved optical glue layer, i.e., a color shift control layer, thereby reducing the CF mask cost and the color glue material cost, and can achieve a viewing angle color shift that is comparable to that of POL.

[0012] In a feasible implementation, a protective layer is provided between the black matrix layer and the light emitting structure layer, and the refractive index N of the protective layer is greater than the refractive index N of the color deviation regulating layer. With such a configuration, the present invention can improve the large-angle color deviation value.

[0013] In a feasible implementation, the refractive index N of the protective layer is between 1.5 and 1.6.

[0014] In a feasible implementation, the black matrix layer is made of black light-absorbing material, the extinction coefficient K of the black matrix layer is between 0.28 and 0.32, and the refractive index N is between 1.6 and 1.7. The black matrix layer can reduce the reflection of external light.

[0015] In a feasible implementation, the black matrix layer includes a body and an end face extending toward the light emitting area, and the angle between the end face and the protective layer is between 75° and 155°. The structure of the black matrix layer can be arbitrarily designed according to the needs of the present invention, and the design is flexible.

[0016] In a feasible implementation, the light emitting structure layer includes a pixel definition layer disposed between the substrate and the protective layer, the pixel definition layer is provided with at least one second opening, one second opening defines a light emitting area, and the pixel definition layer uses a polarizing material. The present invention uses a polarizing material to replace a conventional black pixel definition layer, which has no effect on the color polarization of the viewing angle, and can avoid the problem that the original black pixel definition layer is easy to remain in the pixel light emitting area, affecting the light output and thus affecting the power consumption.

[0017] In a feasible implementation, the projection of the second opening on the substrate is located within the projection of the first opening on the substrate. The present invention limits the black matrix layer to expand a certain distance corresponding to the luminous area, so that the color deviation track of the present invention is similar to the track of the polarizer.

[0018] In a feasible implementation, the light-emitting area includes a G light-emitting area, an R light-emitting area and a B light-emitting area, each light-emitting area corresponds to a first opening, the distance between the G light-emitting area and the corresponding first opening is greater than the distance between the R light-emitting area and the corresponding first opening, the distance between the B light-emitting area and the corresponding first opening is greater than the distance between the G light-emitting area and the corresponding first opening, and the distance between the G light-emitting area and the corresponding first opening is greater than 7um. The present invention limits the black matrix layer to expand the corresponding light-emitting area by a certain distance, so that the color deviation track of the present invention is similar to the track of the polarizer.

[0019] In a feasible implementation, the color shift regulating layer includes the following components by weight percentage:

[0020] Solvent 70-80%;

[0021] Monomer 10-20%;

[0022] Resin 1-10%;

[0023] Additives 1-5%;

[0024] Pigment 0.1~0.5%;

[0025] Preferably, the solvent is selected from 1-methoxy-2-propyl acetate;

[0026] Preferably, the monomers are selected from acrylate monomers;

[0027] Preferably, the resin is selected from epoxy acrylate resin;

[0028] Preferably, the additives include photoinitiators and light stabilizers;

[0029] Preferably, the pigment is selected from carbon black.

[0030] By improving the materials, the present invention can remove the CF (color glue) material compared to conventional COE products and directly replace it with an improved optical glue layer, i.e., a color shift control layer, thereby reducing the CF mask cost and the color glue material cost, and can achieve a viewing angle color shift that is comparable to that of POL.

[0031] In order to solve the above technical problems, another technical solution adopted by the present invention is:

[0032] A display device comprises the display panel as described above.

[0033] Due to the adoption of the above technical solution, the present invention has the following advantages compared with the prior art:

[0034] 1. The display panel of the present invention reduces the cost of process MASK and CF materials during the manufacturing process compared with the products manufactured by the existing COE technology;

[0035] 2. The selection of materials and optimization of structure of the present invention make the color deviation track of the present invention similar to that of the polarizer, so that the color deviation of the viewing angle can reach the same level as that of POL, improve the rainbow phenomenon and enhance the visual enjoyment. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of a display panel in the prior art;

[0037] Figure 2 is a schematic structural diagram of a display panel according to Embodiment 1 of the present invention;

[0038] Among them, 1. anode; 2. pixel light-emitting area; 3. pixel definition layer; 4. packaging structure; 5. protective layer; 6. black matrix layer; 7. color deviation control layer; 8. color glue layer; 9. optical glue layer. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0040] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions used herein are for illustrative purposes only.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In this application, " / " means "or".

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0043] At present, COE technology, after AMOLED completes thin film encapsulation (TFE), through the Color Filter process, R / G / B color films (CF) are deposited on the R / G / B pixels and separated by black matrix (BM), thereby removing the polarizer (POL) on the current OLED screen. Figure 1 shown.

[0044] However, compared with POL technology, on the one hand, COE technology adds a new BM+CF process, which increases the MASK cost, and the CF material cost is relatively high; on the other hand, the transmittance of CF materials at different wavelengths is different, and the BM light-blocking effect makes the viewing angle trajectory and color deviation of COE products different from those of POL products.

[0045] On this basis, in order to improve the viewing angle track and color deviation of the display panel, the present invention provides a display panel and a display device, wherein the display panel comprises: a substrate; a light-emitting structure layer, the light-emitting structure layer is arranged on the substrate; a black matrix layer, the black matrix layer is arranged on the side of the light-emitting structure layer away from the substrate, and has a first opening corresponding to the light-emitting area of ​​the light-emitting structure layer; a color deviation regulating layer, the color deviation regulating layer is arranged on the side of the black matrix layer away from the substrate, and fills the opening of the black matrix layer; wherein the extinction coefficient K of the color deviation regulating layer is between 0 and 0.0001, and the refractive index N is between 1.35 and 1.45. Optionally, the refractive index N is 1.35, 1.40 or 1.45.

[0046] The display panel of the present invention has a novel structure. Compared with conventional COE products, it can not only achieve a viewing angle color deviation comparable to that of POL, but also remove the CF (color glue) material and directly replace it with an improved optical glue layer, i.e., a color deviation regulating layer, thereby reducing the CF mask cost and the color glue material cost.

[0047] The present invention further provides a color deviation regulating layer applied to a display panel. The color deviation regulating layer comprises the following components by weight percentage:

[0048] Solvent 70-80%;

[0049] Monomer 10-20%;

[0050] Resin 1-10%;

[0051] Additives 1-5%;

[0052] Pigment 0.1~0.5%.

[0053] In some specific embodiments, the solvent is selected from 1-methoxy-2-propyl acetate (PGMEA) as a non-hazardous solvent.

[0054] In certain specific embodiments, the monomer is selected from acrylate monomers, and the resin is selected from epoxy acrylate resins.

[0055] In some specific embodiments, the additives include photoinitiators and light stabilizers. Specifically, the photoinitiator generates free radicals under ultraviolet light, which then initiates crosslinking to solidify the material, and can be selected from one or more of photoinitiator 1173, photoinitiator 184, TPO photoinitiator, photoinitiator 2959, and benzophenone. The light stabilizer has an antioxidant effect and has a long-term thermal stabilization effect on the polymer, and can be selected from one or both of light stabilizer 770 and light stabilizer 944.

[0056] In certain specific embodiments, the pigment is selected from carbon black.

[0057] In some specific embodiments, the weight percentage of 1-methoxy-2-propyl acetate can be 70-80%, or 70-78%, or 72-76%, or more specifically 72%, 73%, 74%, 75%, or 76%.

[0058] In other specific embodiments, the weight percentage of the acrylate monomer may be 10-20%, or 12-18%, or 12-16%, or more specifically 12%, 13%, 14%, 15%, or 16%.

[0059] In other specific embodiments, the weight percentage of the epoxy acrylate resin may be 1-10%, or 2-8%, or 4-8%, or more specifically 4%, 5%, 6%, 7%, or 8%.

[0060] In other specific embodiments, the weight percentage of the photoinitiator may be 1-5%, more specifically 1%, 2%, 3%, 4%, or 5%.

[0061] In other specific embodiments, the weight percentage of the light stabilizer may be 1-5%, more specifically 1%, 2%, 3%, 4%, or 5%.

[0062] In other specific embodiments, the weight percentage of carbon black may be 0.1-0.5%, more specifically 0.1%, 0.2%, 0.3%, 0.4%, or 0.5%.

[0063] By improving the materials, the present invention can remove the CF (color glue) material compared to conventional COE products and directly replace it with an improved optical glue layer, i.e., a color shift control layer, thereby reducing the CF mask cost and the color glue material cost, and can achieve a viewing angle color shift that is comparable to that of POL.

[0064] The present invention is described in detail below with reference to specific embodiments.

[0065] Example 1

[0066] The display panel of this embodiment includes a substrate, a light-emitting structure layer, a packaging structure 4 , a protective layer 5 , a black matrix layer 6 , and a color deviation regulating layer 7 .

[0067] In this embodiment, the substrate may be glass and / or polymer resin.

[0068] In this embodiment, the light emitting structure layer is disposed on the substrate, and may include a light emitting element, a thin film transistor electrically connected to the light emitting element, and an insulating layer therebetween.

[0069] In this embodiment, the light emitting element includes a pixel defining layer 3 having a plurality of openings, an anode 1, a hole transport layer, a light emitting layer, an electron transport layer and a cathode sequentially arranged on the anode 1 away from the array substrate.

[0070] Specifically, the pixel definition layer 3 is provided with at least one second opening, and one second opening defines one pixel light emitting area 2 .

[0071] In this embodiment, the pixel light emitting area 2 includes a G light emitting area, an R light emitting area and a B light emitting area.

[0072] In this embodiment, the pixel definition layer 3 uses a polarizing material, and the polarizing material can be selected from any one of the groups of iodine-based polarizing materials, dye-based polarizing materials, and metal polarizing materials. The pixel definition layer 3 does not include a light-blocking material, such as carbon black materials. The present invention uses a polarizing material to replace a conventional black pixel definition layer, which has no effect on the color polarization of the viewing angle, and can avoid the problem that the original black pixel definition layer is easy to remain in the pixel light-emitting area, affecting the light output and thus affecting the power consumption.

[0073] In this embodiment, the encapsulation structure 4 is disposed on a side of the light emitting structure layer away from the substrate, and may include a first inorganic layer, an organic layer, and a second inorganic layer that are alternately stacked, but is not limited thereto.

[0074] In this embodiment, a touch sensor layer may also be provided, and the touch sensor layer is provided on a side of the package structure 4 away from the substrate. The touch sensor layer may be configured to sense external input, for example, a touch of an object such as a finger and / or a stylus, so that the display panel may obtain coordinate information corresponding to the touch position.

[0075] In this embodiment, the protective layer 5 is disposed on a side of the touch sensor layer away from the substrate to protect the touch sensor layer. The refractive index N of the protective layer 5 for 550 nm light is between 1.5 and 1.6, such as 1.5, 1.55 or 1.6.

[0076] In this embodiment, the black matrix layer 6 is disposed on a side of the protection layer 5 away from the substrate and has first openings corresponding to the pixel light-emitting areas 2 of the light-emitting structure layer, and each pixel light-emitting area 2 corresponds to a first opening.

[0077] In this embodiment, the projection of the second opening on the substrate is located within the projection of the first opening on the substrate, that is, the black matrix layer 6 expands outwards by a certain distance relative to the pixel light emitting area 2 .

[0078] In this embodiment, the distance d between the G light-emitting area and the corresponding first opening is greater than the distance d between the R light-emitting area and the corresponding first opening, greater than the distance d between the B light-emitting area and the corresponding first opening, and the distance d between the G light-emitting area and the corresponding first opening is greater than 7um. The present invention limits the black matrix layer 6 to expand a certain distance corresponding to the pixel light-emitting area 2, so that the color deviation track of the present invention is similar to the track of the polarizer.

[0079] In this embodiment, the black matrix layer 6 is made of black light-absorbing material, the extinction coefficient K of the black matrix layer 6 is between 0.28 and 0.32, and the refractive index N of 550nm light is between 1.6 and 1.7. The black matrix layer 6 can reduce the reflection of external light.

[0080] In this embodiment, the black matrix layer 6 includes a body and an end face extending toward the pixel light emitting area 2, and the angle α between the end face and the protective layer 5 is between 75° and 155°, such as 75°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150° or 155°. The end face can be designed as a plane or a curved surface. The present invention can arbitrarily design the structure of the black matrix layer as needed, and the design is flexible.

[0081] In this embodiment, the color deviation control layer 7 is arranged on the side of the black matrix layer 6 away from the substrate, and fills the first opening of the black matrix layer 6, wherein the extinction coefficient K of the color deviation control layer 7 is between 0 and 0.0001, and the refractive index N is between 1.35 and 1.45, such as 1.35, 1.40, and 1.45.

[0082] In this embodiment, the refractive index N of the color shift regulating layer 7 is smaller than the refractive index N of the protective layer 5 .

[0083] In this embodiment, the color deviation regulating layer 7 includes the following components by weight percentage:

[0084] 1-Methoxy-2-propyl acetate 75%;

[0085] Acrylate monomer 13%;

[0086] Epoxy acrylate resin 8%;

[0087] 1173 photoinitiator 2%;

[0088] Light stabilizer 770 1.6%;

[0089] Carbon black 0.4%.

[0090] Example 2

[0091] In this embodiment, the color deviation regulating layer 7 includes the following components by weight percentage:

[0092] 1-Methoxy-2-propyl acetate 70%;

[0093] Acrylate monomer 17%;

[0094] Epoxy acrylate resin 10%;

[0095] 184 photoinitiator 1.2%;

[0096] Light stabilizer 770 1.6%;

[0097] Carbon black 0.2%.

[0098] The other structures of the display panel of this embodiment are the same as those of the first embodiment.

[0099] Example 3

[0100] In this embodiment, the color deviation regulating layer 7 includes the following components by weight percentage:

[0101] 1-Methoxy-2-propyl acetate 80%;

[0102] Acrylate monomer 12%;

[0103] Epoxy acrylate resin 4%;

[0104] 2959 photoinitiator 1.6%;

[0105] Light stabilizer 944 2%;

[0106] Carbon black 0.4%.

[0107] The other structures of the display panel of this embodiment are the same as those of the first embodiment.

[0108] Example 4

[0109] In this embodiment, the color deviation regulating layer 7 includes the following components by weight percentage:

[0110] 1-Methoxy-2-propyl acetate 73%;

[0111] Acrylate monomer 17%;

[0112] Epoxy acrylate resin 5%;

[0113] Benzophenone 2%;

[0114] Light stabilizer 944 2.5%;

[0115] Carbon black 0.5%.

[0116] The other structures of the display panel of this embodiment are the same as those of the first embodiment.

[0117] Effects of the embodiments

[0118] When the structure and components and content of the color deviation control layer in Example 1 are adopted, and the extinction coefficient K of the color deviation control layer 7 is specifically limited to 0 and the refractive index N is 1.4, the 75° color deviation value of the display panel of the present invention can be made <5, which proves that the large-angle color deviation value of the present invention is low and can reach a level comparable to POL.

[0119] Example 5

[0120] This embodiment provides a display device, on which the display panel described in the above embodiments is arranged. Therefore, the display device has all the beneficial effects brought by the display panel described in the above embodiments, which will not be described one by one here.

[0121] Among them, the display device can be a television, a laptop computer, a handheld device (smartphone, tablet computer, etc.), a wearable device (smart bracelet, wireless headset, smart watch, smart glasses, etc.), a vehicle-mounted device (navigation system, assisted reversing system, driving recorder, car refrigerator, etc.), a virtual reality device, a terminal device (Terminal Device), etc., without limitation here.

[0122] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0123] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A display panel, characterized in that: include: substrate; A light emitting structure layer, wherein the light emitting structure layer is disposed on the substrate; a black matrix layer, the black matrix layer being arranged on a side of the light emitting structure layer away from the substrate and having a first opening corresponding to a light emitting area of ​​the light emitting structure layer; A color deviation regulating layer, wherein the color deviation regulating layer is disposed on a side of the black matrix layer away from the substrate and fills the openings of the black matrix layer; Wherein, the extinction coefficient K of the color deviation regulating layer is between 0 and 0.0001, and the refractive index N is between 1.35 and 1.

45.

2. The display panel according to claim 1, characterized in that: A protective layer is disposed between the black matrix layer and the light-emitting structure layer, and a refractive index N of the protective layer is greater than a refractive index N of the color deviation regulating layer.

3. The display panel according to claim 2, characterized in that: The refractive index N of the protective layer is between 1.5 and 1.

6.

4. The display panel according to claim 1, characterized in that: The black matrix layer is made of black light-absorbing material, the extinction coefficient K of the black matrix layer is between 0.28 and 0.32, and the refractive index N is between 1.6 and 1.

7.

5. The display panel according to claim 2, characterized in that: The black matrix layer includes a body and an end surface extending toward the light-emitting area, and an angle between the end surface and the protective layer is between 75° and 155°.

6. The display panel according to claim 1, characterized in that: The light emitting structure layer comprises a pixel definition layer disposed between the substrate and the protective layer, the pixel definition layer is provided with at least one second opening, one second opening defines one light emitting area, and the pixel definition layer is made of polarizing material.

7. The display panel according to claim 6, characterized in that: A projection of the second opening on the substrate is located within a projection of the first opening on the substrate.

8. The display panel according to claim 7, characterized in that: The light-emitting area includes a G light-emitting area, an R light-emitting area and a B light-emitting area, each of the light-emitting areas corresponds to a first opening, the distance between the G light-emitting area and the corresponding first opening is greater than the distance between the R light-emitting area and the corresponding first opening, which is greater than the distance between the B light-emitting area and the corresponding first opening, and the distance between the G light-emitting area and the corresponding first opening is greater than 7um.

9. The display panel according to claim 1, characterized in that: In terms of weight percentage, the color shift regulating layer includes the following components: Solvent 70-80%; Monomer 10-20%; Resin 1-10%; Additives 1-5%; Pigment 0.1~0.5%; Preferably, the solvent is selected from 1-methoxy-2-propyl acetate; Preferably, the monomer is selected from acrylate monomers; Preferably, the resin is selected from epoxy acrylate resin; Preferably, the additives include photoinitiators and light stabilizers; Preferably, the pigment is selected from carbon black.

10. A display device, characterized in that: The invention comprises the display panel as claimed in any one of claims 1 to 9.

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