Display panel and display device

Abstract

The present application discloses a display panel and a display device, wherein the display panel includes a substrate, a pixel driving layer, a light emitting unit layer, and a light filtering function layer, wherein the pixel driving layer is arranged on the substrate; the light emitting unit layer is arranged on the pixel driving layer; the light filtering function layer is arranged on the light emitting unit layer; wherein the light emitting unit includes a red light emitting unit, a green light emitting unit, and a blue light emitting unit, and the light filtering function includes a sensing structure and a light regulating layer, wherein the sensing structure is used to control the light transmittance of the light regulating layer in the area where the green light emitting unit and the blue light emitting unit are located to increase after sensing water and oxygen. The present application reduces the reddening phenomenon of the display panel after water and oxygen intrusion by setting a light filtering function layer, and changes the transmittance of the light regulating layer after sensing water and oxygen through the sensing structure, thereby improving the quality of the display panel.

Description

Technical Field

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

[0002] Organic light emitting diodes (OLEDs) have the advantages of surface light source, cold light, energy saving, fast response, flexibility, ultra-thinness and low cost, and their mass production technology is becoming increasingly mature. Since OLEDs have poor stability and are extremely sensitive to water and oxygen, encapsulation technology is particularly critical. The purpose of encapsulation is mainly to prevent water vapor and oxygen from entering the OLED, and cracks are easily generated during the production process of the encapsulation layer. When cracks appear on the display screen or water vapor enters from the outside, the aging speed of the OLED organic light-emitting layer device will be accelerated. Therefore, strict encapsulation must be performed to extend the life and improve stability.

[0003] However, the edge of the display panel is generally the weakest position of the package. After the display panel is subjected to high temperature and high humidity reliability verification, water and oxygen intrusion is prone to occur at the edge of the display panel, causing the light transmission wavelength range of the insulating layer at the edge to change, causing the edge of the display panel to appear red when displayed. Summary of the invention

[0004] The purpose of the present application is to provide a display panel and a display device, which can reduce the redness of the display panel after water and oxygen invasion by setting a light filtering functional layer, and improve the quality of the display panel by changing the transmittance of the light adjustment layer after sensing water and oxygen through a sensing structure.

[0005] The present application discloses a display panel, which includes a base substrate, a pixel driving layer, a light emitting unit layer, and a light filtering function layer, wherein the pixel driving layer is arranged on the base substrate; the light emitting unit layer is arranged on the pixel driving layer; the light filtering function layer is arranged on the light emitting unit layer; wherein the light emitting unit includes a red light emitting unit, a green light emitting unit and a blue light emitting unit, and the light filtering function includes a sensing structure and a light regulating layer, wherein the sensing structure is used for controlling the light transmittance of the light regulating layer in the area where the green light emitting unit and the blue light emitting unit are located to increase after sensing water oxygen.

[0006] Optionally, the light filtering functional layer also includes a sealing layer, the sealing layer is provided with a plurality of sealing cavities, each of the sealing cavities is respectively provided with the sensing structure and the light regulating layer; the sensing structure is used to sense water oxygen in the sealing layer; the sensing structure is arranged on a side of the light regulating layer away from the light-emitting unit layer.

[0007] Optionally, the light adjusting layer includes an acidic solution and a pH-sensitive hydrogel, the pH-sensitive hydrogel is located in the acidic solution, and the light transmittance of the pH-sensitive hydrogel in a solution with a higher pH value is higher; the sensing structure includes an alkaline metal and an anion exchange membrane, the anion exchange membrane is used to isolate the alkaline metal and the light adjusting layer, and the alkaline metal is used to absorb water oxygen and then release alkaline anions to pass through the anion exchange membrane into the acidic solution to increase the pH value of the acidic solution.

[0008] Optionally, the sensing structure further includes a gas filter membrane and a liquid filter membrane, a reaction cavity is formed between the gas filter membrane and the liquid filter membrane, the alkaline metal is arranged in the reaction cavity, the gas filter membrane is arranged on a side of the liquid filter membrane away from the light adjustment layer, and the liquid filter membrane is arranged between the reaction cavity and the anion exchange membrane.

[0009] Optionally, the alkaline metal includes metallic sodium, which absorbs water oxygen to form a sodium hydroxide solution, and the sodium hydroxide solution releases hydroxide ions into the acidic solution.

[0010] Optionally, the thickness of the light filtering functional layer is between 1um and 5um; the display panel includes a display area and a non-display area, the light filtering functional layer extends from the display area to the non-display area, and the distance between the boundary of the light filtering functional layer and the boundary of the display area is between 1000um and 2000um.

[0011] Optionally, the display area includes a middle area and a peripheral area, the peripheral area is arranged around the middle area, the light filtering function layer is arranged in the peripheral area and extends to the non-display area; wherein the light adjustment layer is arranged corresponding to the green light-emitting unit and the blue light-emitting unit.

[0012] Optionally, the sealing layer is formed of an inorganic insulating material, which includes one or more of an aluminum oxide ceramic material, a silicon oxide material or a silicon nitride material, and the inner wall material of the sealing cavity is formed of a high molecular weight polyethylene material.

[0013] Optionally, the display panel includes a display area and a non-display area, the display area includes an opening area and a non-opening area, the red light-emitting unit, the green light-emitting unit and the blue light-emitting unit are respectively located in the opening areas, and on the orthographic projection of the base substrate, there is at least one opening area within the projection range of the sealed cavity; the display panel also includes a color filter layer, the color filter layer includes a black matrix and a plurality of color filter portions, the black matrix is ​​arranged in the non-opening area, and the plurality of color filter portions are respectively arranged in the plurality of opening areas.

[0014] The present application discloses a display device, comprising a driving circuit and the above-mentioned display panel, wherein the driving circuit is used to drive the display panel to display.

[0015] The present application sets a light filtering functional layer inside the display panel and uses a sensing structure to sense whether there is water and oxygen intrusion. When there is water and oxygen intrusion, the light transmittance of the light adjustment layer is controlled to increase, so that the light transmittance of the area where the green light-emitting unit and the blue light-emitting unit are located increases, and the brightness of the green light-emitting unit and the blue light-emitting unit in the water and oxygen intrusion area is increased to balance the reddening phenomenon caused by the change in the light transmission wavelength range of the insulating layer due to water and oxygen intrusion. The present application mainly improves the brightness of the green pixel area and the blue pixel area and adopts a compensation method to improve the reddening phenomenon in the water and oxygen intrusion area of ​​the display panel, thereby improving the display quality of the display panel and extending the service life of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0017] Figure 1 is a schematic diagram of a display panel according to a first embodiment of the present application;

[0018] Figure 2 is a schematic top view of a display panel of the present application;

[0019] Figure 3 is a schematic diagram of a light filtering functional layer according to a first embodiment of the present application;

[0020] Figure 4 is a schematic diagram of a light filtering functional layer according to a second embodiment of the present application;

[0021] Figure 5 is a schematic diagram of a display panel according to a second embodiment of the present application;

[0022] Figure 6 is a schematic diagram of a display device of the present application.

[0023] Among them, 100, display panel; 101, display area; 102, non-display area; 103, middle area; 104, peripheral area; 105, opening area; 106, non-opening area; 110, substrate; 111, pixel driving layer; 120, light emitting unit layer; RLED, red light emitting unit; GLED, green light emitting unit; BLED, blue light emitting unit; 130, light filtering function layer; 131, sealing layer; 131a, sealing cavity; 140, Sensing structure; 141, alkaline metal; 142, anion exchange membrane; 143, gas filter membrane; 144, liquid filter membrane; 145, reaction chamber; 150, light adjustment layer; 151, acidic solution; 152, pH-sensitive hydrogel; 153, heating layer; 154, thermal expansion temperature-sensitive hydrogel layer; 160, encapsulation layer; 170, color filter layer; 171, black matrix; 172, color filter unit; 200, display device; 210, driving circuit. DETAILED DESCRIPTION

[0024] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative, but the present application can be implemented in many alternative forms and should not be construed as being limited to only the embodiments described herein.

[0025] In the description of the present application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "multiple" means two or more. In addition, the terms "upper", "lower", "left", "right", "vertical", "horizontal", etc. indicating orientation or positional relationships are described based on the orientation or relative positional relationships shown in the accompanying drawings, and are only for the convenience of describing the simplified description of the present application, rather than indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0026] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0027] Figure 1 is a schematic diagram of a display panel of the first embodiment of the present application, see Figure 1As shown, the present application discloses a display panel 100, which includes a base substrate 110, a pixel driving layer 111, a light emitting unit layer 120, and a light filtering function layer 130, wherein the pixel driving layer 111 is arranged on the base substrate 110; the light emitting unit layer 120 is arranged on the pixel driving layer 111; the light filtering function layer 130 is arranged on the light emitting unit layer 120; wherein the light emitting unit includes a red light emitting unit RLED, a green light emitting unit GLED and a blue light emitting unit BLED, and the light filtering function includes a sensing structure 140 and a light regulating layer 150, and the sensing structure 140 is used to control the light transmittance of the light regulating layer 150 in the area where the green light emitting unit GLED and the blue light emitting unit BLED are located after sensing water oxygen.

[0028] The present application sets a light filtering functional layer 130 inside the display panel 100, and uses a sensing structure 140 to sense whether there is water and oxygen intrusion. When there is water and oxygen intrusion, the light transmittance of the light adjustment layer 150 is controlled to increase, so that the light transmittance of the area where the green light-emitting unit GLED and the blue light-emitting unit BLED are located increases, and the brightness of the green light-emitting unit GLED and the blue light-emitting unit BLED in the water and oxygen intrusion area is increased to balance the reddening phenomenon caused by the change in the wavelength range of light transmission of the insulating layer due to water and oxygen intrusion. The present application mainly improves the brightness of the green pixel area and the blue pixel area, and adopts a compensation method to improve the reddening phenomenon in the water and oxygen intrusion area of ​​the display panel 100, thereby improving the display quality of the display panel 100 and extending the service life of the display panel 100.

[0029] Figure 2 is a top view schematic diagram of the display panel of the present application, see Figure 2 As shown, specifically, the display panel 100 includes a display area 101 and a non-display area 102, and the light filtering functional layer 130 extends from the display area 101 to the non-display area 102, so that the light filtering functional layer 130 can cover the junction of the display area 101 and the non-display area 102. Relatively speaking, the edge of the display panel 100 is prone to water and oxygen intrusion, especially at the edge of the display area 101, which affects the display. In this embodiment, by setting the light filtering functional layer 130 at the junction of the display area 101 and the non-display area 102, when there is water and oxygen intrusion in the display panel 100, the display of the edge area of ​​the display area 101 can be compensated, thereby improving the color cast problem.

[0030] It is understandable that when water and oxygen invade from the encapsulation layer 160, even if it does not enter the light-emitting unit layer 120, but enters the insulating layer in the encapsulation layer 160, such as the insulating layer formed of silicon nitride or silicon dioxide materials, the wavelength range of light transmission of such insulating layers will change, so that the transmittance of silicon nitride and silicon dioxide to red light increases, resulting in an increase in the proportion of red light in the edge area of ​​the display area 101, resulting in color cast. Generally speaking, the encapsulation layer 160 includes multiple layers such as inorganic layers and organic layers, which are generally formed of silicon nitride and silicon dioxide materials. When cracks exist in the encapsulation layer 160 or water and oxygen invade between the film layer interfaces, the area where water and oxygen invade is prone to color cast.

[0031] Specifically, the display area 101 includes a middle area 103 and a peripheral area 104, the peripheral area 104 is arranged around the middle area 103, and the light filtering functional layer 130 is arranged in the peripheral area 104 and extends toward the non-display area 102. In this embodiment, the light filtering functional layer 130 can be specifically arranged in the peripheral area 104 to achieve color cast compensation for the peripheral area 104. The area of ​​the peripheral area 104 is less than or equal to the area of ​​the middle area 103.

[0032] This embodiment may only consider the problem of water and oxygen intrusion caused by film rupture in the bending area. Therefore, for the display panel 100 that is bent and stretched such as folded or curled, the light filtering functional layer 130 mentioned in the present application may only be arranged in the folding area of ​​the display panel 100 to achieve color cast compensation in the folding area.

[0033] Furthermore, the distance between the boundary of the light filtering functional layer 130 and the boundary of the display area 101 is between 1000um and 2000um. The boundary of the light filtering functional layer 130 refers to the edge of the non-display area 102, because the non-display area 102 does not participate in the display, and the light filtering functional layer 130 can be extended to the non-display area 102 by a certain length to fully protect the boundary of the peripheral area 104.

[0034] For the peripheral area 104, in order to change the transmittance of the light adjustment layer 150 at the positions of the blue light emitting unit BLED and the green light emitting unit GLED, the light adjustment layer 150 can be set as a whole layer, and only the transmittance of the light adjustment layer 150 at the positions of the green light emitting unit GLED and the blue light emitting unit BLED can be controlled to compensate for the color cast of the peripheral area 104. It is also possible to set the light adjustment layer 150 only at the positions of the green light emitting unit GLED and the blue light emitting unit BLED, so that the light adjustment layer 150 is set corresponding to the green light emitting unit GLED and the blue light emitting unit BLED, and after the sensing structure 140 senses water oxygen, the light adjustment layer 150 at the corresponding position is controlled to produce a transmittance change.

[0035] In the solution where the light adjustment layer 150 is only provided at the locations of the green light-emitting unit GLED and the blue light-emitting unit BLED, it is necessary to ensure that when no color cast compensation is performed, the light transmittance of the areas where the red light-emitting unit RLED, the green light-emitting unit GLED and the blue light-emitting unit BLED are located is consistent; when the sensing structure 140 detects water and oxygen intrusion, the light transmittance of the green light-emitting unit GLED and the blue light-emitting unit BLED is increased at the corresponding positions to achieve brightness compensation for the green light and the blue light.

[0036] Among them, in the pixel arrangement, the red pixel can be set separately, and the green pixel and the blue pixel can be set in a bundle. For example, for a pixel composed of a red pixel, a green pixel and a blue pixel, the positions of the green pixel and the blue pixel are set closer, and the blue pixels and the green pixels between different pixels are closer, so that when the light adjustment layer 150 is set to cover only the blue pixels and the green pixels, the area setting is more reasonable.

[0037] Specifically, taking the first outermost column of pixels in the peripheral area 104 as an example, the red pixels are arranged in the outermost layer, and the blue pixels and the green pixels are arranged in the innermost position of the red pixels. In the second column of pixels, the red pixels are arranged in the innermost part of the pixel area of ​​the column, so that the blue pixels and the green pixels in the second column of pixels are adjacent to the blue pixels and the green pixels in the first column of pixels, so that the light adjustment layer 150 is arranged on the above blue pixels and green pixels, but the light adjustment layer 150 is not arranged on the red pixels.

[0038] Figure 3 is a schematic diagram of the light filtering functional layer of the first embodiment of the present application, see Figure 3As shown, in this embodiment, the sensing structure 140 in the present application can use active metal to detect whether water and oxygen enter into the encapsulation layer 160. In this embodiment, the sensing structure 140 is arranged on the periphery of the encapsulation layer 160 and is located in the non-display area 102, and the light adjustment layer 150 is arranged in the peripheral area 104 in the display area 101. By arranging the sensing structure 140 on the periphery, when water and oxygen enter the periphery of the encapsulation layer 160, the active metal will be corroded, thereby causing electrical changes, and determining whether there is water and oxygen invasion by indirect detection. Of course, the above-mentioned active metal may include aluminum metal, etc., and may also be arranged inside the encapsulation layer 160, and correspondingly, the opposite side electrode is also arranged on the outside to form a capacitor. When the electrical property of the internal aluminum electrode changes, the capacitance of the two will also change, thereby detecting the presence of water vapor entering the encapsulation layer 160.

[0039] In this embodiment, the light adjustment layer 150 has the function of adjusting the transmittance, and its main material can be formed by a hydrogel material, wherein the hydrogel material is synthesized by monomers or polymers through forming a water-permeable cross-linked network. The monomers are polymerized to form polymers, and then an interpenetrating polymer network (IPN) is formed through a gel process (cross-linking method). The hydrogel material can retain a large amount of water and maintain a three-dimensional network structure. The cross-linking of the condensed network can be divided into non-covalent bonds (i.e., physical cross-linking) or covalent bonds (i.e., chemical cross-linking). Hydrogels are usually jelly-like solids with elasticity. Polymer hydrogel materials can be defined as cross-linked polymers that can swell in water and retain a large amount of water but cannot be dissolved. The forces that induce phase transitions in polymers are summarized into four categories: hydrophobic interactions, hydrophilic interactions (including hydrogen bonds and water solvation), van der Waals forces, and electrostatic interactions between ions. As the external environment changes, these four forces compete with each other, causing the conformation of the polymer segments in the solution to change, ultimately leading to the occurrence of phase transition. During the phase transition process, the polymer hydrogel material changes in transmittance, thereby achieving the regulation of light transmittance.

[0040] When the macromolecular chain has both hydrophilic and hydrophobic groups, the linear polymer will change the conformation of the molecular chain in the aqueous solution as the solution temperature changes, from an extended random coil to a globular shape. This conformational change is generally considered to be the result of the competition between hydrophilic and hydrophobic effects. For example, materials such as polyacrylamide and polyacrylic acid have thermal expansion temperature sensitivity. Chitosan hydrogel polymers based on such polymers can have phase transition capabilities at different temperatures by adjusting their composition, and their light transmittance varies at different phase transition degrees.

[0041] The light adjustment layer 150 in this embodiment can be formed of a temperature-sensitive hydrogel material, such as a heat-expanding temperature-sensitive hydrogel. The light adjustment layer 150 specifically includes a sealing layer 131, a sealing cavity 131a is provided in the sealing layer 131, and a temperature-raising layer 153 and a heat-expanding temperature-sensitive hydrogel layer 154 are provided in the sealing cavity 131a. The temperature-raising layer 153 is used to provide heat for the heat-expanding temperature-sensitive hydrogel layer 154, and the heat-expanding temperature-sensitive hydrogel layer 154 is used to absorb different heat to produce different transmittances. The temperature-raising layer 153 can be made of a wave-absorbing temperature-raising material, which is used to convert the absorbed ultrasound into a temperature rise. The wave-absorbing material can absorb or weaken the electromagnetic wave energy projected on its surface, and convert the electromagnetic wave energy into heat energy or other forms through the dielectric loss or magnetic loss of the material. The wave-absorbing and heating material includes a graphene / vanadium dioxide composite aerogel material or a ceramic wave-absorbing fiber material. The graphene / vanadium dioxide composite aerogel material has a heating function under ultrasound, and has different heating gradients under ultrasound of different wavelengths, for example, the longer the wavelength, the higher the heating temperature. Of course, ultrasound of the same wavelength can also be used to adjust the time parameters to make the heating layer 153 reach the target temperature. The representative of the ceramic wave-absorbing fiber material is silicon carbide (SiC). In silicon carbide (SiC), the wavelength of 2GHz to 7GHz is a low absorption frequency band, and the absorption degree of ultrasound is low. The wavelength of 8GHz to 18GHz is a high absorption frequency band, and the absorption degree of ultrasound can reach up to 90%. Rapid heating to the target temperature is achieved by adjusting the wavelength and time parameters.

[0042] The above-mentioned wave-absorbing and temperature-raising material needs to absorb external wave sources to generate heat. The frequency, wave intensity and time of ultrasound will affect the temperature of thermal conversion of the wave-absorbing material. Therefore, by adjusting this, the thermal change of the thermal expansion temperature-sensitive hydrogel layer 154 can be achieved.

[0043] In another embodiment, the light adjustment layer 150 of the present application can use a pH-sensitive hydrogel 152. The molecular chains of polyacrylic acid (PAA) and polymethacrylic acid (PMAA) contain a large number of ionizable COOH groups, so they are a type of smart polymer hydrogel material with pH-sensitive properties, which can also be called pH-sensitive hydrogel 152 material. When the pH value of the solution is higher than the pKa of polyacrylic acid (pKa refers to the acidity coefficient or the dissociation constant of the drug, codenamed Ka value. In chemistry and biochemistry, it refers to a specific equilibrium constant to represent the ability of an acid to dissociate hydrogen ions), the COOH group is in a dissociated state. At this time, the hydrophilicity of PAA is enhanced, and the electrostatic repulsion of COO- causes the polyacrylic acid chain to exist in an extended random coil conformation, and the free energy of the system is minimized; when the pH value of the solution is lower than the pKa of polyacrylic acid (PAA), since the hydrophilicity of COOH is lower than that of COO-, the hydrophilicity of polyacrylic acid (PAA) is weakened and the hydrophobicity is relatively enhanced. When the pH value is lower than the pKa of polymethacrylic acid, due to the hydrophobic interaction between the backbone carbon chain and the side chain methyl, PMAA adopts a highly compressed coil conformation. As the pH value increases, COOH dissociates to obtain a negative charge, and the Coulomb electrostatic effect causes PMAA to transform into a looser extended conformation. Therefore, changing the pH value of the solution will cause a conformational change in acrylic polymers, so this type of substance is pH sensitive. This type of polymer can be adjusted to have phase transition capabilities at different pH values, and its light transmittance is different at different phase transition degrees.

[0044] The pH-sensitive hydrogel 152 mentioned above needs to control the pH value so that the light adjustment layer 150 has different light transmittances. To this end, the following designs are made in this embodiment:

[0045] Figure 4 is a schematic diagram of the light filtering functional layer of the second embodiment of the present application, see Figure 4 As shown, specifically, the light filtering functional layer 130 further includes a sealing layer 131, and the sealing layer 131 is provided with a plurality of sealed cavities 131a, and each of the sealed cavities 131a is respectively provided with the sensing structure 140 and the light adjusting layer 150. It can be understood that each sealed cavity 131a needs to be provided corresponding to the blue light emitting unit BLED and the green light emitting unit GLED, including one sealed cavity 131a corresponding to one blue light emitting unit BLED or one green light emitting unit GLED, or one sealed cavity 131a corresponding to multiple blue light emitting units BLED or multiple green light emitting units GLED.

[0046] The sensing structure 140 is used to sense water and oxygen in the sealing layer 131 , and is disposed on a side of the light adjustment layer 150 away from the light emitting unit layer 120 . Specifically, each sealing cavity 131 a is disposed corresponding to at least one opening area 105 .

[0047] In the present application, the sensing structure 140 and the light adjustment layer 150 are sealed in a plurality of sealed cavities 131a by means of a sealing layer 131. The sealing layer 131 may not be provided on one side of the sealed cavity 131a where the sensing structure 140 is provided, or a thinner sealing layer 131 may be provided, so that when water and oxygen invade the encapsulation layer 160, the water and oxygen can enter the sensing structure 140, so that the sensing structure 140 adjusts the transmittance of the light adjustment layer 150 by adjusting the pH value of the pH-sensitive hydrogel 152.

[0048] Specifically, the sensing structure 140 includes an alkaline metal 141 and an anion exchange membrane 142, wherein the anion exchange membrane 142 is used to isolate the alkaline metal 141 and the light adjustment layer 150, and the alkaline metal 141 is used to release alkaline anions after absorbing water oxygen and pass through the anion exchange membrane 142 into the acidic solution 151 to increase the pH value of the acidic solution 151. The alkaline metal 141 refers to a solution that is alkaline after reacting with water oxygen, and the pH value is above 7. It can be understood that the sealing layer 131 of this embodiment is disposed on the light-emitting unit, and can be located in the encapsulation layer 160 or under the encapsulation layer 160.

[0049] In this embodiment, when water and oxygen exist in the encapsulation layer 160, the sensing structure 140 contacts the water and oxygen, and the alkaline metal 141 reacts with the water and oxygen to generate alkaline anions. The anion exchange membrane 142 can only pass through anions and has a small pore size, allowing only OH- ions to pass through, and anions larger than OH- cannot pass through. When the OH- ions enter the pH-sensitive hydrogel 152, the OH- ions neutralize the H+ ions, thereby increasing the pH value, so that the light transmittance of the pH-sensitive hydrogel 152 increases.

[0050] Specifically, the light adjustment layer 150 includes an acidic solution 151 and a pH-sensitive hydrogel 152, wherein the pH-sensitive hydrogel 152 is located in the acidic solution 151, and the light transmittance of the pH-sensitive hydrogel 152 in a solution with a larger pH value is higher. In this embodiment, the pH-sensitive hydrogel 152 is disposed in the acidic solution 151, so that the pH-sensitive hydrogel 152 has an initial light transmittance, which can be specifically set to be between 0 and 10% of the light transmittance of the pH-sensitive hydrogel 152 in the acidic solution 151; when the OH- ions in the acidic solution 151 gradually increase, the light transmittance of the pH-sensitive hydrogel 152 is increased from 10% to 100%.

[0051] The sealing layer 131 is formed of an inorganic insulating material, which includes one or more of an aluminum oxide ceramic material, a silicon oxide material, or a silicon nitride material. The inner wall material of the sealing cavity 131 a is formed of a high molecular weight polyethylene material.

[0052] The sealing layer 131 in this embodiment mainly plays a sealing role to prevent the internal acidic solution 151 and pH-sensitive hydrogel 152 from leaking. Of course, in general, the internal acidic solution 151 and pH-sensitive hydrogel 152 are relatively light in weight and can be sealed by a sealing layer 131 of a certain thickness. The overall thickness of the optical filtering functional layer 130 is between 1um and 5um.

[0053] Considering that the alkaline metal 141 has a reaction product after reacting with water and oxygen, a reaction chamber 145 can also be provided so that the reaction product does not leak. Specifically, the sensing structure 140 also includes a gas filter membrane 143 and a liquid filter membrane 144, a reaction chamber 145 is formed between the gas filter membrane 143 and the liquid filter membrane 144, the alkaline metal 141 is provided in the reaction chamber 145, the gas filter membrane 143 is provided on a side of the liquid filter membrane 144 away from the light adjustment layer 150, and the liquid filter membrane 144 is provided between the reaction chamber 145 and the anion exchange membrane 142.

[0054] In this embodiment, the gas filter membrane 143 can pass water vapor and oxygen, and the liquid filter membrane 144 can pass liquid. After the alkaline metal 141 in the reaction chamber 145 reacts with water oxygen, taking metallic sodium as an example, sodium reacts with water oxygen to produce a sodium hydroxide alkaline solution, and after passing through the liquid filter membrane 144, the OH- ions are further released into the acidic solution 151 through the anion exchange membrane 142. Among them, the anion exchange membrane 142 also isolates the reaction chamber 145 from the acidic solution 151. Among them, the alkaline metal 141 includes metallic sodium, and the metallic sodium absorbs water oxygen to form a sodium hydroxide solution, and the sodium hydroxide solution releases hydroxide ions into the acidic solution 151.

[0055] In this embodiment, a sealing layer 131, an alkaline metal 141, an anion exchange membrane 142, and a pH-sensitive hydrogel 152 are provided. Through the above structure, when the peripheral encapsulation layer 160 fails and water and oxygen enter the above-mentioned sensing structure 140, the metal Na absorbs water and oxygen and reacts to produce a NaOH alkaline solution. After passing through the above-mentioned liquid filter membrane 144 / anion filter membrane, OH- ions enter the acidic solution 151 of the pH-sensitive hydrogel 152. The pH value of the acidic solution 151 changes with the continuous entry of OH- ions, and the pH-sensitive hydrogel completes different degrees of phase transition in solutions with different pH values. It is worth mentioning that when OH- ions enter the acidic solution 151 to increase the pH value of the acidic solution 151, when there is no more water and oxygen intrusion, the pH value of the acidic solution 151 is stable, and the light adjustment layer 150 has a fixed light transmittance. When water and oxygen invade again, the light transmittance of the light adjustment layer 150 can continue to increase until the threshold value.

[0056] When the screen does not have any packaging failure and displays normally, the initial light transmittance of the pH-sensitive hydrogel 152 is about 0-10%. This value is determined by the material's own characteristics and the pH value of the acidic solution 151. In this case, the edge screen displays evenly. When the packaging fails and water vapor enters the edge position, the pH value of the acidic solution 151 in the sealed cavity 131a changes, and the pH-sensitive hydrogel 152 at the corresponding position undergoes a corresponding degree of phase transition, so that the transmittance at this position is adjusted accordingly, and the corresponding green pixels and blue pixels can be compensated for brightness. The redness of the edge of the screen is improved and the overall brightness is uniform. Since the pH change value of the solution in the cavity is directly related to the amount of water vapor entering, the water vapor invasion and the influence of the corresponding film layer can be reversely determined. After the color point offset is determined, the brightness compensation amount of the green pixels and blue pixels of the corresponding degree can also be determined, and then the required light transmittance can be reversed. The transmittance is related to the pH value of the acidic solution 151, and the pH value is determined by the amount of water vapor entering, so there is a direct relationship between the two. The size of the area that needs to be compensated and the coefficient relationship between the pH value and the transmittance can be directly determined based on this relationship.

[0057] Figure 5 is a schematic diagram of a display panel of the second embodiment of the present application, see Figure 5 As shown, the display panel 100 includes a display area 101 and a non-display area 102, the display area 101 includes an opening area 105 and a non-opening area 106, and the red light-emitting unit RLED, the green light-emitting unit GLED and the blue light-emitting unit BLED are respectively located in the opening area 105. The display panel 100 also includes a color filter layer 170, the color filter layer 170 includes a black matrix 171 and a plurality of color filter portions 172, the black matrix 171 is arranged in the non-opening area 106, and the plurality of color filter portions 172 are respectively arranged in the plurality of opening areas 105. This embodiment can be applied to a COE display panel 100, COE (Color film on Encapsulation, forming a color filter on a thin film encapsulation structure) is a new technology to replace polarizers, the maximum transmittance of the color filter can reach 60%, which can greatly increase the light output brightness, thereby reducing the power consumption of OLED devices and improving lifespan.

[0058] On the orthographic projection of the base substrate 110, there is at least one opening area 105 within the projection range of the sealed cavity 131a; for example, one sealed cavity 131a may be provided corresponding to a plurality of opening areas 105, and the plurality of opening areas 105 are provided with a blue light emitting unit BLED and a green light emitting unit GLED, respectively. For example, one sealed cavity 131a may be provided corresponding to one opening area 105, and one opening area 105 may be provided with a blue light emitting unit BLED or a green light emitting unit GLED.

[0059] Figure 6 is a schematic diagram of the display device of the present application, see Figure 6 As shown, the present application further discloses a display device, wherein the display device 200 includes a driving circuit 210 and the display panel 100 in the above embodiment, wherein the driving circuit 210 is used to drive the display panel 100 to display.

[0060] The present application sets a light filtering functional layer 130 inside the display panel 100, and uses a sensing structure 140 to sense whether there is water and oxygen intrusion. When there is water and oxygen intrusion, the light transmittance of the light adjustment layer 150 is controlled to increase, so that the light transmittance of the area where the green light-emitting unit GLED and the blue light-emitting unit BLED are located increases, and the brightness of the green light-emitting unit GLED and the blue light-emitting unit BLED in the water and oxygen intrusion area is increased to balance the reddening phenomenon caused by the change in the wavelength range of light transmission of the insulating layer due to water and oxygen intrusion. The present application mainly improves the brightness of the green pixel area and the blue pixel area, and adopts a compensation method to improve the reddening phenomenon in the water and oxygen intrusion area of ​​the display panel 100, thereby improving the display quality of the display panel 100 and extending the service life of the display panel 100.

[0061] It should be noted that the inventive concept of the present application can form a large number of embodiments, but the length of the application document is limited and it is impossible to list them one by one. Therefore, under the premise of no conflict, the embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effects will be enhanced.

[0062] The above content is a further detailed description of the present application in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. A display panel, characterized in that: include: substrate substrate; A pixel driving layer is arranged on the base substrate; A light emitting unit layer, arranged on the pixel driving layer; as well as A light filtering functional layer is arranged on the light emitting unit layer; The light-emitting unit layer includes a plurality of red light-emitting units, a plurality of green light-emitting units and a plurality of blue light-emitting units, and the light filtering function includes a sensing structure and a light adjustment layer, wherein the sensing structure is used to control the light transmittance of the light adjustment layer in the area where the green light-emitting units and the blue light-emitting units are located to increase after sensing water oxygen; The light filtering functional layer further comprises a sealing layer, wherein the sealing layer is provided with a plurality of sealing cavities, wherein the sensing structure and the light regulating layer are respectively provided in each of the sealing cavities; the sensing structure is used to sense water and oxygen in the sealing layer; the sensing structure is provided on a side of the light regulating layer away from the light emitting unit layer; The light adjustment layer includes an acidic solution and a pH-sensitive hydrogel, wherein the pH-sensitive hydrogel is located in the acidic solution, and the light transmittance of the pH-sensitive hydrogel in a solution with a higher pH value is higher; The sensing structure includes an alkaline metal and an anion exchange membrane, wherein the anion exchange membrane is used to isolate the alkaline metal and the light adjustment layer, and the alkaline metal is used to release alkaline anions after absorbing water oxygen and then pass through the anion exchange membrane into the acidic solution to increase the pH value of the acidic solution.

2. The display panel according to claim 1, characterized in that: The sensing structure also includes a gas filter membrane and a liquid filter membrane, a reaction cavity is formed between the gas filter membrane and the liquid filter membrane, the alkaline metal is arranged in the reaction cavity, the gas filter membrane is arranged on a side of the liquid filter membrane away from the light adjustment layer, and the liquid filter membrane is arranged between the reaction cavity and the anion exchange membrane.

3. The display panel according to claim 2, characterized in that: The alkaline metal includes metallic sodium. The metallic sodium absorbs water oxygen to form a sodium hydroxide solution. The sodium hydroxide solution releases hydroxide ions and enters the acidic solution.

4. The display panel according to claim 1, characterized in that: The thickness of the optical filtering functional layer is between 1um and 5um; The display panel includes a display area and a non-display area, the light filtering functional layer extends from the display area to the non-display area, and the distance between the boundary of the light filtering functional layer and the boundary of the display area is between 1000um and 2000um.

5. The display panel according to claim 4, characterized in that: The display area includes a middle area and a peripheral area, the peripheral area is arranged around the middle area, the light filtering functional layer is arranged in the peripheral area and extends toward the non-display area; Wherein, the light adjustment layer is arranged corresponding to the green light emitting unit and the blue light emitting unit.

6. The display panel according to claim 1, characterized in that: The sealing layer is formed of an inorganic insulating material, which includes one or more of an aluminum oxide ceramic material, a silicon oxide material or a silicon nitride material. The inner wall material of the sealing cavity is formed of a high molecular weight polyethylene material.

7. The display panel according to claim 1, characterized in that: The display panel includes a display area and a non-display area, the display area includes an opening area and a non-opening area, the red light emitting unit, the green light emitting unit and the blue light emitting unit are respectively located in the opening area, and on the orthographic projection of the base substrate, there is at least one opening area within the projection range of the sealed cavity; The display panel further includes a color filter layer, which includes a black matrix and a plurality of color filter portions. The black matrix is ​​arranged in the non-opening area, and the plurality of color filter portions are respectively arranged in the plurality of opening areas.

8. A display device, characterized in that: It comprises a driving circuit and the display panel according to any one of claims 1 to 7, wherein the driving circuit is used to drive the display panel to display.

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