Display screen and electronic equipment

Abstract

The invention provides a display screen and electronic equipment. The display screen comprises a substrate, a display layer and a blue light absorption layer. The display layer comprises a back face and a display face which are oppositely arranged in the thickness direction of the display layer. The display layer and the substrate are stacked in the thickness direction of the display screen, and the back face of the display layer faces the substrate. The display layer is used for emitting emergent light, the emergent light comprises harmful blue light, and the emergent light is emitted through the display surface. The blue light absorption layer comprises a base material and a blue light absorbent, and the blue light absorbent is dispersed in the base material. In the thickness direction of the display screen, the blue light absorption layer and the display layer are stacked, the blue light absorption layer is located on the side close to the display face, and the blue light absorption layer covers the display face. The blue light absorbent is used for absorbing at least part of harmful blue light, and the wavelength of the harmful blue light is 400-455nm. The display screen provided by the invention can solve the technical problem that blue light generated by a display screen in the prior art is high in energy and easy to hurt human eyes.

Description

Technical Field

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

[0002] With the development of science and technology, electronic devices (such as mobile phones, tablets, watches, etc.) have become an indispensable tool in people's daily lives. Consumers are increasingly concerned about the damage to the eyes caused by frequent and long-term use of electronic devices. The display screens of existing electronic devices will produce blue light, among which the blue light with a wavelength of 400-455nm has extremely high energy and can penetrate the lens directly to the retina, causing irreversible damage to the physiological structure of the human eye. Summary of the invention

[0003] The present application provides a display screen and an electronic device, which have the function of absorbing harmful blue light, and can solve the technical problem in the prior art that the blue light generated by the display screen has high energy and is easy to cause damage to the human eye.

[0004] The present application provides a display screen. The display screen includes a substrate, a display layer and a blue light absorbing layer. The display layer includes a back surface and a display surface. The back surface and the display surface are arranged opposite to each other along the thickness direction of the display layer. Along the thickness direction of the display screen, the display layer and the substrate are stacked, and the back surface faces the substrate. The display layer is used to emit outgoing light. The outgoing light includes harmful blue light, and the outgoing light is emitted through the display surface.

[0005] The blue light absorbing layer includes a substrate and a blue light absorber, wherein the blue light absorber is dispersed in the substrate. Along the thickness direction of the display screen, the blue light absorbing layer is stacked with the display layer and is located on a side close to the display surface, and the blue light absorbing layer covers the display surface. The blue light absorber is used to absorb at least part of the harmful blue light, wherein the harmful blue light is blue light with a wavelength of 400nm to 455nm.

[0006] In this embodiment, by adding a blue light absorber to the blue light absorbing layer, the blue light absorbing layer has a blue light absorbing function, so that the blue light absorbing layer can effectively absorb the harmful blue light with a wavelength of 400nm to 455nm generated by the display layer, reduce or even avoid the harmful blue light generated by the display layer from being emitted to the outside of the display screen, and thus reduce or even avoid the damage to the human eye caused by the harmful blue light.

[0007] In a possible implementation manner, the blue light absorber is used to absorb the harmful blue light with a wavelength of 410 nm to 450 nm.

[0008] It should be noted that harmful blue light with a wavelength of 410nm to 450nm has extremely high energy and can penetrate the lens of the human eye directly to the retina, causing irreversible damage to the physiological structure of the human eye. In this embodiment, by adding a blue light absorber capable of absorbing harmful blue light with a wavelength of 410nm to 450nm to the blue light absorption layer, it is possible to reduce or even prevent the harmful blue light with a wavelength of 410nm to 450nm generated by the display layer from being emitted to the outside of the display screen, thereby reducing or even preventing the harmful blue light from causing damage to the human eye.

[0009] In a possible implementation, the harmful blue light transmittance of the blue light absorbing layer is less than or equal to 10%. That is, more than or equal to 90% of the harmful blue light emitted by the display layer is absorbed by the blue light absorbing layer, and less than or equal to 10% of the harmful blue light can pass through the blue light absorbing layer. The display screen provided by this embodiment has high absorption efficiency for harmful blue light, which can greatly reduce or even prevent harmful blue light from being emitted to the outside of the display screen.

[0010] At the same time, the visible light transmittance of the blue light absorbing layer is greater than or equal to 90%. That is, greater than or equal to the visible light emitted by the display layer can pass through the blue light absorbing layer. That is, the blue light absorbing layer in the display screen provided by this embodiment can ensure the blue light absorption performance while also ensuring the display effect of the display screen.

[0011] In a possible embodiment, the blue light absorber includes an organic small molecule compound that can absorb blue light. The organic small molecule compound that can absorb blue light is any one or more of benzotriazole, benzophenone, and triazine, or the organic small molecule compound that can absorb blue light is an organic small molecule compound containing one or more of benzotriazole functional group, benzophenone functional group, and triazine functional group.

[0012] In a possible implementation manner, the mass ratio of the organic small molecule compound capable of absorbing blue light to the substrate is 1:200 to 1:10. In this embodiment, the mass ratio of the organic small molecule compound capable of absorbing blue light to the substrate is very small, which can further reduce the influence of the blue light absorber on the original performance of the substrate while ensuring the blue light absorption performance of the blue light absorption layer, that is, reduce the influence of the blue light absorber on the light transmission performance or packaging performance of the blue light absorption layer.

[0013] In a possible implementation, the blue light absorber includes an inorganic substance capable of absorbing blue light, and the inorganic substance capable of absorbing blue light is any one or more of graphene oxide, titanium oxide, or zirconium oxide. The mass ratio of the inorganic substance capable of absorbing blue light to the substrate is 1:20 to 1:2.5.

[0014] In this embodiment, the mass ratio of the inorganic substance that can absorb blue light to the substrate is very small. While ensuring the blue light absorption performance of the blue light absorption layer, it can further reduce the influence of the blue light absorber on the original performance of the substrate, that is, reduce the influence of the blue light absorber on the light transmittance or packaging performance of the blue light absorption layer.

[0015] In a possible implementation, the blue light absorber includes an organic small molecule compound capable of absorbing blue light and an inorganic substance capable of absorbing blue light. The mass ratio of the organic small molecule compound capable of absorbing blue light to the substrate is 1:200 to 1:10, and the mass ratio of the inorganic substance capable of absorbing blue light to the substrate is 1:20 to 1:2.5.

[0016] In this embodiment, the blue light absorbing layer contains both organic small molecule compounds that can absorb blue light and inorganic substances that can absorb blue light, which can improve the blue light absorption performance of the blue light absorbing layer, that is, improve the absorption efficiency of the blue light absorbing layer for harmful blue light.

[0017] In a possible implementation, the display screen further includes an encapsulation layer, a touch layer, a polarizing layer, and a cover plate. Along the thickness direction of the display screen, the encapsulation layer, the touch layer, the polarizing layer, and the cover plate are stacked in sequence and are all located on a side of the display layer close to the display surface, and the encapsulation layer faces the display surface and is connected to the display surface.

[0018] The encapsulation layer acts as an encapsulation for the display layer, preventing oxygen and moisture from entering the display layer, and protecting the display layer. The touch layer is arranged on the side of the encapsulation layer facing away from the display layer. When the user touches the display screen, the electrical properties (such as resistance, capacitance, etc.) of the touch layer change, and the changes in the electrical properties are transmitted to the main board in the electronic device. The main board controls the display content of the display screen, so that the display screen can recognize and respond to the user's touch operation, realizing the touch function of the display screen.

[0019] The polarizing layer is disposed between the touch layer and the cover plate. In this embodiment, by disposing the polarizing layer between the display layer and the cover plate, the propagation direction and intensity of the outgoing light emitted by the display layer can be adjusted, and the reflected light generated by the external light entering the display screen can be offset, and the interference caused by the reflection of the external light can be reduced, thereby enhancing the contrast of the display screen and improving the display effect of the display screen.

[0020] In this embodiment, by providing a cover plate, the structures on the inner side of the cover plate (such as the polarizing layer, the touch layer, the blue light absorption layer and the display layer, etc.) can be protected to prevent damage to the structures on the inner side of the cover plate, thereby improving the durability of the display screen.

[0021] In a possible implementation, the substrate is an optical adhesive. The blue light absorbing layer is bonded between the encapsulation layer and the touch layer. Alternatively, the blue light absorbing layer is bonded between the touch layer and the polarizing layer. Alternatively, the blue light absorbing layer is bonded between the polarizing layer and the cover plate.

[0022] In this embodiment, optical glue is used as the base material in the blue light absorbing layer, so that the blue light absorbing layer has both bonding and blue light absorbing functions, which can simplify the structure of the display screen and simplify the manufacturing process of the display screen. In addition, there is no need to additionally set up a layer structure with blue light absorbing performance, thereby reducing the thickness of the display screen.

[0023] In a possible implementation, the substrate is an optical adhesive, and the blue light absorbing layer includes a first blue light absorbing layer and a second blue light absorbing layer. The first blue light absorbing layer is bonded between the encapsulation layer and the touch layer, and the second blue light absorbing layer is bonded between the touch layer and the polarizing layer. Alternatively, the first blue light absorbing layer is bonded between the encapsulation layer and the touch layer, and the second blue light absorbing layer is bonded between the polarizing layer and the cover plate. Alternatively, the first blue light absorbing layer is bonded between the touch layer and the polarizing layer, and the second blue light absorbing layer is bonded between the polarizing layer and the cover plate.

[0024] In this embodiment, by setting two blue light absorption layers, the harmful blue light emitted by the display layer can be absorbed by the first blue light absorption layer and the second blue light absorption layer in sequence, thereby improving the absorption effect of harmful blue light, further reducing the harmful blue light emitted to the outside of the display screen, and reducing or even avoiding the damage of harmful blue light to the human eye.

[0025] In a possible implementation, the substrate is an optical adhesive. The blue light absorbing layer includes a first blue light absorbing layer, a second blue light absorbing layer and a third blue light absorbing layer. The first blue light absorbing layer is bonded between the encapsulation layer and the touch layer, the second blue light absorbing layer is bonded between the touch layer and the polarizing layer, and the third blue light absorbing layer is bonded between the polarizing layer and the cover plate.

[0026] In this embodiment, by setting up three blue light absorption layers, the harmful blue light emitted by the display layer can be absorbed by the first blue light absorption layer, the second blue light absorption layer and the third blue light absorption layer in sequence, thereby further improving the absorption effect of harmful blue light, reducing the harmful blue light emitted to the outside of the display screen, and reducing or even avoiding the damage of harmful blue light to the human eye.

[0027] In a possible implementation manner, the substrate is an organic packaging material, and the blue light absorbing layer is disposed between the packaging layer and the touch layer, and is connected to the packaging layer and the touch layer.

[0028] In this embodiment, the blue light absorbing layer not only absorbs blue light but also performs encapsulation. By arranging a blue light absorbing layer with encapsulation function on the side of the encapsulation layer facing away from the display layer, the encapsulation effect of the display layer can be improved.

[0029] In a possible implementation, the encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer. Along the thickness direction of the display screen, the first inorganic encapsulation layer, the organic encapsulation layer, and the second inorganic encapsulation layer are stacked in sequence, and the first inorganic encapsulation layer faces the display layer and is connected to the display layer. The second inorganic encapsulation layer faces the blue light absorbing layer and is connected to the blue light absorbing layer. The thickness of the first inorganic encapsulation layer is 0.1 μm to 0.4 μm, and the thickness of the second inorganic encapsulation layer is 0.05 μm to 0.4 μm.

[0030] In the present embodiment, an organic encapsulation material is used as the substrate in the blue light absorbing layer. While ensuring the encapsulation effect, the thickness of the first inorganic encapsulation layer and the second inorganic encapsulation layer can be reduced, that is, the thickness of the inorganic encapsulation layer is reduced, thereby reducing the bending stress of the first inorganic encapsulation layer and the second inorganic encapsulation layer, improving the bending resistance and bending resistance of the display screen, and avoiding cracks or peeling of the first inorganic encapsulation layer and the second inorganic encapsulation layer when bent.

[0031] In a possible implementation, the display screen further includes a transition layer. The material of the transition layer is silicon nitride, silicon oxynitride, or silicon oxide. The transition layer is disposed between the blue light absorbing layer and the touch layer, and is connected to the blue light absorbing layer and the touch layer.

[0032] In this embodiment, the display layer can be further encapsulated by providing a transition layer, thereby improving the encapsulation effect of the display screen. The transition layer can also protect the blue light absorbing layer, preventing the blue light absorbing layer from directly contacting the touch layer, causing the organic material in the touch layer to react with the organic material in the blue light absorbing layer, resulting in interface swelling, thereby causing optical problems and affecting the display effect of the display screen.

[0033] In a possible implementation, the encapsulation layer includes a first inorganic encapsulation layer and a second inorganic encapsulation layer. The first inorganic encapsulation layer and the second inorganic encapsulation layer are stacked along the thickness direction of the display screen. The substrate is an organic encapsulation material, and the blue light absorbing layer is disposed between the first inorganic encapsulation layer and the second inorganic encapsulation layer.

[0034] The blue light absorbing layer in this embodiment is an organic encapsulation layer with blue light absorbing performance, and the blue light absorbing layer can simultaneously play the role of encapsulation and blue light absorbing. In this embodiment, the blue light absorbing layer is used to replace the organic encapsulation layer in the encapsulation layer, which can achieve the blue light absorbing function and the encapsulation function at the same time, can simplify the structure of the display screen, simplify the manufacturing process of the display screen, and no additional layer structure with blue light absorbing performance is required, thereby reducing the thickness of the display screen.

[0035] In a possible implementation, the display screen includes an encapsulation layer, a filter layer, a touch layer, and a cover plate. Along the thickness direction of the display screen, the encapsulation layer, the filter layer, the touch layer, and the cover plate are stacked in sequence and are all located on a side of the display layer close to the display surface. The encapsulation layer faces the display surface and is connected to the display surface.

[0036] In this embodiment, by setting a filter layer on the outside of the encapsulation layer, the light emitted by the display layer can be filtered, so that the display screen can display normally. In addition, in this embodiment, a color filter is used instead of a polarizer, and there is no need to set a polarizer, which improves the light transmittance of the display screen, improves the display effect of the display screen, and reduces the power consumption of the display screen.

[0037] In a possible implementation manner, the substrate is an optical adhesive, and the blue light absorbing layer is bonded between the filter layer and the touch layer, or the blue light absorbing layer is bonded between the touch layer and the cover plate.

[0038] In this embodiment, optical glue is used as the base material in the blue light absorbing layer, so that the blue light absorbing layer has both bonding and blue light absorbing functions, which can simplify the structure of the display screen and simplify the manufacturing process of the display screen. In addition, there is no need to additionally set up a layer structure with blue light absorbing performance, thereby reducing the thickness of the display screen.

[0039] In a possible implementation, the substrate is an optical adhesive. The blue light absorbing layer includes a first blue light absorbing layer and a second blue light absorbing layer. The first blue light absorbing layer is bonded between the filter layer and the touch layer, and the second blue light absorbing layer is bonded between the touch layer and the cover plate.

[0040] In this embodiment, by setting two blue light absorption layers, the harmful blue light emitted by the display layer can be absorbed by the first blue light absorption layer and the second blue light absorption layer in sequence, thereby improving the absorption effect of harmful blue light, further reducing the harmful blue light emitted to the outside of the display screen, and reducing or even avoiding the damage of harmful blue light to the human eye.

[0041] On the other hand, the present application provides an electronic device, including a housing and the above-mentioned display screen, wherein the display screen is mounted on the housing, and the substrate is located on a side close to the housing.

[0042] In summary, the display screen provided by the present application adds a blue light absorber to the blue light absorbing layer so that the blue light absorbing layer has a blue light absorbing function, so that the blue light absorbing layer can effectively absorb the harmful blue light with a wavelength of 400nm to 455nm generated by the display layer, reduce or even avoid the harmful blue light generated by the display layer from being emitted to the outside of the display screen, and thus reduce or even avoid the damage to the human eye caused by the harmful blue light. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0044] Figure 1 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0045] Figure 2 yes Figure 1 A schematic diagram of a partial cross-sectional structure of a display screen in the electronic device shown in the first embodiment;

[0046] Figure 3 yes Figure 2 An enlarged structural schematic diagram of the encapsulation layer in the display screen;

[0047] Figure 4 yes Figure 2 An enlarged structural schematic diagram of a blue light absorbing layer in the display screen shown;

[0048] Figure 5 yes Figure 2 The blue light absorption spectrum of the display shown;

[0049] Figure 6 yes Figure 1 A schematic diagram of a partial cross-sectional structure of a display screen in the electronic device shown in the second embodiment;

[0050] Figure 7 yes Figure 1 A schematic diagram of a partial cross-sectional structure of a display screen in the electronic device shown in the third embodiment;

[0051] Figure 8 yes Figure 1 A schematic diagram of a partial cross-sectional structure of a display screen in the electronic device shown in the fourth embodiment;

[0052] Fig. 9 yes Figure 1 A schematic diagram of a partial cross-sectional structure of a display screen in the electronic device shown in the fifth embodiment;

[0053] Fig.10 yes Figure 1A schematic diagram of a partial cross-sectional structure of a display screen in the electronic device shown in the sixth embodiment;

[0054] Fig.11 yes Figure 1 A schematic diagram of a partial cross-sectional structure of a display screen in the electronic device shown in the seventh embodiment;

[0055] Fig.12 yes Figure 1 The diagram is a partial cross-sectional structural diagram of a display screen in an electronic device in an eighth embodiment. DETAILED DESCRIPTION

[0056] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0057] See also Figure 1 , Figure 1 It is a schematic diagram of the structure of an electronic device 200 provided in an embodiment of the present application.

[0058] The electronic device 200 includes but is not limited to a cell phone, a notebook computer, a tablet personal computer, a wearable device, a smart watch, etc. In the embodiment of the present application, the electronic device 200 is described as a cell phone.

[0059] For ease of description, the width direction of the electronic device 200 is defined as the X direction, the length direction of the electronic device 200 is defined as the Y direction, and the thickness direction of the electronic device 200 is defined as the Z direction. The X direction, the Y direction, and the Z direction are perpendicular to each other.

[0060] The electronic device 200 includes a display screen 100 and a housing 210. The display screen 100 is mounted on the housing 210. The display screen 100 is used to display text, images, videos, and the like.

[0061] In this embodiment, the electronic device 200 is a straight-screen mobile phone, and the display screen 100 is a curved screen. For example, the display screen 100 is an organic light-emitting diode (OLED) display screen, or an active-matrix organic light-emitting diode (AMOLED) display screen, or a mini organic light-emitting diode (MILLED) display screen. In other embodiments, the display screen 100 may also be a rigid display screen, such as a liquid crystal display (LCD).

[0062] In one embodiment, the electronic device 200 may also be a foldable screen mobile phone, and the display screen 100 is a foldable screen.

[0063] See also Figure 2 , Figure 2 yes Figure 1 The display screen 100 in the electronic device 200 is a schematic diagram of a partial cross-section structure in the first embodiment.

[0064] The display screen 100 includes a substrate 10, a display layer 20, an encapsulation layer 30, a blue light absorbing layer 40, a touch layer 51, a polarizing layer 52, and a cover plate 55. The substrate 10, the display layer 20, the encapsulation layer 30, the blue light absorbing layer 40, the touch layer 51, the polarizing layer 52, and the cover plate 55 are stacked in sequence along the Z direction. The substrate 10 is located on a side close to the inside of the electronic device 200, and the cover plate 55 is located on a side away from the inside of the electronic device 200 and faces the outside of the electronic device 200.

[0065] The substrate 10 may be a glass substrate, a sapphire substrate, a silicon wafer substrate, a ceramic substrate or a flexible substrate. In the present embodiment, the substrate 10 is a polyimide (PI) film. In other embodiments, the substrate 41 may also be a film material made of other materials, such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate diformic acid glycol estr (PEN), etc. The substrate 10 is used to carry components of the display screen 100, such as the display layer 20, the polarizing layer 52, the cover plate 55, etc.

[0066] In one embodiment, a buffer layer (not shown) is further provided on the side of the substrate 10 facing the display layer 20. The buffer layer can be made of inorganic materials such as silicon oxide and silicon nitride, or can be formed by stacking one or more inorganic layer colloids. The display layer 20 is provided on the side of the buffer layer facing away from the substrate 10. The buffer layer can reduce the penetration of foreign materials, water vapor or oxygen into the display layer 20, and play a protective role for the display layer 20.

[0067] The display layer 20 includes a light emitting unit 21 and a driving unit 22. The light emitting unit 21 includes a plurality of groups of pixel units 201. Each group of pixel units 201 includes three sub-pixels. The three sub-pixels are respectively a first sub-pixel 211, a second sub-pixel 212, and a third sub-pixel 213. The first sub-pixel 211, the second sub-pixel 212, and the third sub-pixel 213 are arranged at intervals. The first sub-pixel 211 can emit red light, the second sub-pixel 212 can emit green light, and the third sub-pixel 213 can emit blue light.

[0068] The driving unit 22 is made of a thin film transistor (TFT). The driving unit 22 is provided with a plurality of driving circuits. Each sub-pixel corresponds to a driving circuit. Each driving circuit is used to control whether the corresponding sub-pixel emits light and the intensity of the light, thereby controlling the color and intensity of the light emitted by each group of pixel units 201, and further enabling the light-emitting unit 21 to form text, images, videos, etc.

[0069] The display layer 20 also includes a back surface 23 and a display surface 24. The back surface 23 and the display surface 24 are arranged opposite to each other along the Z direction. It can be understood that the back surface 23 is the surface of the driving unit 22 facing away from the light-emitting unit 21, and the display surface 24 is the surface of the light-emitting unit 21 facing away from the driving unit 22. The display layer 20 is stacked on the side of the substrate 10 facing away from the housing 210. Among them, the back surface 23 faces the substrate 10 and is connected to the substrate 10, and the display surface 24 faces the blue light absorption layer 40, that is, toward the outside of the electronic device 200. The outgoing light emitted by the light-emitting unit 21 is emitted from the display surface 24, and then passes through the encapsulation layer 30, the blue light absorption layer 40, the touch layer 51, the polarizing layer 52 and the cover plate 55 to the outside of the display screen 100, so that the user can observe the text, images and videos displayed by the display layer 20 on the side of the display screen 100 close to the cover plate 55.

[0070] It should be noted that the emitted light mentioned here is the light emitted by the light emitting unit 21. It is understandable that the emitted light includes visible light and blue light. Visible light of different colors constitutes the text, images, and videos displayed on the display screen 100. Blue light includes harmful blue light with a wavelength of 400nm to 455nm. Harmful blue light has extremely high energy and can penetrate the lens of the human eye directly to the retina, causing irreversible damage to the physiological structure of the human eye.

[0071] Please also read Figure 3 , Figure 3 yes Figure 2 An enlarged structural diagram of the encapsulation layer 30 in the display screen 100 is shown.

[0072] The encapsulation layer 30 includes a first encapsulation layer 31, a second encapsulation layer 32 and a third encapsulation layer 33. The first encapsulation layer 31 is made of an inorganic material. For example, the first encapsulation layer 31 is made of silicon oxide (SiO x ) or silicon oxynitride (SiO x N y ). The thickness of the first encapsulation layer 31 is about 1 μm. The second encapsulation layer 32 is made of an organic material. Exemplarily, the material of the second encapsulation layer 32 is an acrylic polymer material, a silicone polymer material, or an epoxy resin polymer material. The thickness of the second encapsulation layer 32 is about 10 μm. The third encapsulation layer 33 is made of an inorganic material. Exemplarily, the third encapsulation layer 33 is made of silicon nitride (SiN x ) or silicon oxynitride (SiO x N y The thickness of the third encapsulation layer 33 is about 1 μm.

[0073] The first encapsulation layer 31 , the second encapsulation layer 32 and the third encapsulation layer 33 are stacked in sequence along the Z direction and fixedly connected to each other. The first encapsulation layer 31 is located on the side facing the display layer 20 , and the first encapsulation layer 31 is fixedly connected to the display layer 20 .

[0074] The first encapsulation layer 31 and the third encapsulation layer 33 made of inorganic materials have good sealing performance, which can prevent external oxygen and water from entering the display layer 20, and protect the display layer 20, thereby improving the durability of the display screen 100. The second encapsulation layer 32 made of organic materials has a large thickness, which can extend the transmission path of external oxygen and water, and further block the external oxygen and water from invading the display layer 20, thereby improving the encapsulation effect.

[0075] In other embodiments, the encapsulation layer 30 may also be composed of a layer of material. The embodiment of the present application does not specifically limit the structure of the encapsulation layer 30 , as long as the encapsulation of the display layer 20 can be achieved.

[0076] See also Figure 4 , Figure 4 yes Figure 2 An enlarged schematic diagram of the structure of the blue light absorbing layer 40 in the display screen 100 is shown.

[0077] The blue light absorbing layer 40 includes a substrate 41 and a blue light absorber 42. The substrate 41 is an optical adhesive. The optical adhesive can be an OCA (Optically Clear Adhesive) optical adhesive or an OCR (Optical Clear Resin) optical adhesive. Exemplarily, the material of the substrate 41 is an acrylic polymer material, a silicone polymer material, an epoxy resin polymer material, etc.

[0078] The blue light absorber 42 is a substance that can absorb harmful blue light. The blue light absorber 42 is uniformly dispersed in the substrate 41. Exemplarily, the blue light absorbing layer 40 can be obtained by melting and mixing the blue light absorber 42 and the substrate 41, and then molding; or, the blue light absorbing layer 40 can also be obtained by adding the blue light absorber 42 during the preparation process of the substrate 41 and then molding.

[0079] In this embodiment, harmful blue light refers to blue light with a wavelength of 400nm to 455nm. That is, the blue light absorber 42 can absorb blue light with a wavelength of 400nm to 455nm. Preferably, the blue light absorber 42 can absorb blue light with a wavelength of 430nm to 450nm. Alternatively, the blue light absorber 42 can absorb blue light with a wavelength of 420nm to 440nm; alternatively, the blue light absorber 42 can absorb blue light with a wavelength of 420nm to 435nm; alternatively, the blue light absorber 42 can absorb blue light with a wavelength of 420nm to 430nm; alternatively, the blue light absorber 42 can absorb blue light with a wavelength of 430nm to 440nm.

[0080] The full width at half maximum (FWMH) of the absorption spectrum of the blue light absorber 42 is less than or equal to 30 nm. Preferably, the full width at half maximum of the absorption spectrum of the blue light absorber 42 is less than or equal to 15 nm, or the full width at half maximum of the absorption spectrum of the blue light absorber 42 is in the range of 10 nm to 18 nm. The "full width at half maximum" refers to the width of the peak at half the peak height in the chromatogram. In this embodiment, the full width at half maximum of the absorption spectrum of the blue light absorber 42 is small, which can improve the accuracy of the wavelength band of the blue light absorbed by the blue light absorber 42, so that the blue light absorber 42 can accurately absorb harmful blue light, reduce or avoid the blue light absorber 42 absorbing light of other wavelengths other than harmful blue light, and affect the display effect of the display screen 100.

[0081] In this embodiment, the blue light absorber 42 is an organic small molecule compound that can absorb blue light. Among them, the blue light absorber 42 can be granular or powdery. The organic small molecule compound that can absorb blue light can be any one of organic small molecule compounds such as benzotriazole, benzophenone, triazine, etc. Alternatively, the organic small molecule compound that can absorb blue light can also be a mixture of any two or more of organic small molecule compounds such as benzotriazole, benzophenone, triazine, etc. Alternatively, the organic small molecule compound that can absorb blue light can also be an organic small molecule compound containing one or more functional groups such as benzotriazole functional group, benzophenone functional group, triazine functional group, etc.

[0082] In this embodiment, the substrate 41 is 100 parts, and the blue light absorber 42 is 0.5 parts to 10 parts. It should be noted that the "parts" mentioned here are weight percentages, and the same explanation is given below. For example, when the substrate 41 is 100g, the blue light absorber 42 is 0.5g to 10g. That is, the mass ratio of the blue light absorber 42 to the substrate 41 is 1:200 to 1:10. In this embodiment, by setting the mass ratio of the blue light absorber 42 to the substrate 41 to 1:200 to 1:10, it is possible to ensure that the blue light absorbing layer 40 can effectively absorb harmful blue light without affecting the original performance of the substrate 41, that is, to ensure the blue light absorption performance of the blue light absorbing layer 40.

[0083] In this embodiment, by setting the mass ratio of the blue light absorber 42 to the substrate 41 to 1:200-1:10, the blue light absorbing layer 40 can have both good light transmission performance and blue light absorbing performance.

[0084] In one embodiment, the base material 41 is 100 parts, and the blue light absorber 42 is 0.5 parts to 2 parts. That is, the mass ratio of the blue light absorber 42 to the base material 41 is 1:200 to 1:50. In this embodiment, by setting the mass ratio of the base material 41 to the blue light absorber 42 to 1:200 to 1:50, while ensuring the blue light absorption performance of the blue light absorption layer 40, the influence of the blue light absorber 42 on the original performance of the base material 41 can be further reduced, that is, the influence of the blue light absorber 42 on the light transmission performance or packaging performance of the blue light absorption layer 40 can be reduced.

[0085] In one embodiment, the blue light absorber 42 is an inorganic substance that can absorb blue light. Among them, the blue light absorber 42 can be granular or powdery. Exemplarily, the inorganic substance that can absorb blue light is any one or more of inorganic substances such as graphene oxide, titanium oxide or zirconium oxide. At this time, the substrate 41 is 100 parts, and the blue light absorber 42 is 5 parts to 40 parts. That is, the mass ratio of the blue light absorber 42 to the substrate 41 is 1:20 to 1:2.5. Alternatively, the substrate 41 is 100 parts, and the blue light absorber 42 is 5 parts to 15 parts. That is, the mass ratio of the blue light absorber 42 to the substrate 41 is 1:20 to 3:20.

[0086] In one embodiment, the blue light absorber 42 is a mixture of an organic small molecule compound that can absorb blue light and an inorganic substance that can absorb blue light. That is, the blue light absorber 42 includes both an organic small molecule compound that can absorb blue light and an inorganic substance that can absorb blue light. Among them, the organic small molecule compound that can absorb blue light is any one or more of organic small molecules such as benzotriazole, benzophenone, and triazine. The inorganic substance that can absorb blue light is any one or more of inorganic substances such as graphene oxide, titanium oxide, or zirconium oxide. At this time, the substrate 41 is 100 parts, the organic small molecule compound that can absorb blue light is 0.5 to 10 parts or 0.5 to 2 parts, and the inorganic substance that can absorb blue light is 5 to 40 parts or 5 to 15 parts. That is, the mass ratio of the organic small molecule compound capable of absorbing blue light to the substrate 41 is 1:200 to 1:10, or 1:200 to 1:50; the mass ratio of the inorganic substance capable of absorbing blue light to the substrate 41 is 1:20 to 1:2.5, or 1:20 to 3:20.

[0087] like Figure 2 As shown, the blue light absorbing layer 40 is disposed between the encapsulation layer 30 and the touch layer 51, and is fixedly connected to the encapsulation layer 30 and the touch layer 51. The outgoing light emitted by the display layer 20 is emitted to the encapsulation layer 30 through the display surface 24, and then emitted to the blue light absorbing layer 40. At least part of the harmful blue light in the outgoing light is absorbed by the blue light absorbing layer 40, and the visible light in the outgoing light passes through the blue light absorbing layer 40 and is emitted to the outside of the display screen 100.

[0088] In this embodiment, the absorption rate of harmful blue light of the blue light absorption layer 40 is greater than or equal to 90%, and the transmittance of harmful blue light of the blue light absorption layer 40 is less than or equal to 90%. That is, greater than or equal to 90% of the harmful blue light emitted by the display layer 20 is absorbed by the blue light absorber 42 in the blue light absorption layer 40, and less than or equal to 10% of the harmful blue light can pass through the blue light absorption layer 40.

[0089] In one embodiment, the absorption rate of harmful blue light by the blue light absorbing layer 40 is approximately 100%. That is, the harmful blue light emitted by the display layer 20 is almost completely absorbed by the blue light absorbing layer 40, and almost no harmful blue light passes through the blue light absorbing layer 40 to the outside of the display screen 100.

[0090] At the same time, the visible light transmittance of the blue light absorbing layer 40 is greater than or equal to 90%. That is, greater than or equal to 90% of the visible light emitted by the display layer 20 can pass through the blue light absorbing layer 40. That is, the blue light absorbing layer 40 in the display screen 100 provided in this embodiment can ensure the blue light absorption performance while also ensuring the display effect of the display screen 100.

[0091] See also Figure 5 , Figure 5 yes Figure 2 The blue light absorption spectrum of display screen 100 is shown.

[0092] Depend on Figure 5 It can be seen that among the blue light emitted by the display layer 20 , the blue light with a wavelength greater than or equal to 451 nm can pass through the display screen 100 and be emitted to the outside of the display screen 100 , while the harmful blue light with a wavelength of 430 nm to 450 nm cannot be emitted to the outside of the display screen 100 .

[0093] In this embodiment, by adding a blue light absorber 42 to the blue light absorbing layer 40, the blue light absorbing layer 40 has blue light absorbing performance, so that the blue light absorbing layer 40 can effectively absorb the harmful blue light generated by the display layer 20, reduce or even prevent the harmful blue light generated by the display layer 20 from being emitted to the outside of the display screen 100, and thus reduce or even prevent the harmful blue light from causing damage to the human eye. The display screen 100 provided in this embodiment is a zero-harmful blue light eye protection screen.

[0094] It can be understood that the blue light absorbing layer 40 in this embodiment is an optical adhesive layer with blue light absorbing performance. The blue light absorbing layer 40 can play a bonding role and a blue light absorbing role at the same time. In this embodiment, by mixing a blue light absorber 42 with blue light absorbing performance into a substrate 41 of the optical adhesive layer to prepare an optical adhesive layer with blue light absorbing performance, that is, the blue light absorbing layer 40, the structure of the display screen 100 and the manufacturing process of the display screen 100 can be simplified, and there is no need to additionally set a layer structure with blue light absorbing performance, thereby reducing the thickness of the display screen 100.

[0095] Please continue reading Figure 2, the touch layer 51 is disposed on the surface of the blue light absorbing layer 40 facing away from the encapsulation layer 30, and is connected to the blue light absorbing layer 40. That is, the blue light absorbing layer 40 is bonded between the encapsulation layer 30 and the touch layer 51. The touch layer 51 has conductive properties and is electrically connected to the main board in the electronic device 200. When a user touches the display screen 100, the electrical properties (such as resistance, capacitance, etc.) of the touch layer 51 change, and the changes in the electrical properties are transmitted to the main board in the electronic device 200. The main board controls the display content of the display screen 100, so that the display screen 100 can recognize and respond to the user's touch operation, thereby realizing the touch function of the display screen 100.

[0096] The polarizing layer 52 is a polarizing film. The polarizing film is made of a thin film material with polarizing function. The polarizing layer 52 is arranged between the touch layer 51 and the cover plate 55. The outgoing light emitted by the display layer 20 passes through the polarizing layer 52 and then is emitted from the cover plate 55. In this embodiment, by arranging the polarizing layer 52 between the display layer 20 and the cover plate 55, the propagation direction and intensity of the outgoing light emitted by the display layer 20 can be adjusted, and the reflected light generated by the external light entering the display screen 100 can also be offset, and the interference caused by the reflection of the external light can be reduced, so that the contrast of the display screen 100 can be enhanced and the display effect of the display screen 100 can be improved.

[0097] like Figure 2 As shown, the display screen 100 also includes a first adhesive layer 53. In this embodiment, the first adhesive layer 53 is an OCA optical adhesive. In other embodiments, the first adhesive layer 53 may also be an OCR optical adhesive. The first adhesive layer 53 has high light transmittance and high adhesion. The first adhesive layer 53 is bonded between the polarizing layer 52 and the touch layer 51. In this embodiment, OCA optical adhesive is used as the first adhesive layer 53, so that the first adhesive layer 53 can achieve a fixed connection between the polarizing layer 52 and the touch layer 51 while not affecting the display effect of the display layer 20.

[0098] Please continue reading Figure 2, the display screen 100 also includes a light extraction layer 54. The light extraction layer 54 includes a first refractive portion 541 and a second refractive portion 542. Among them, the refractive index of the first refractive portion 541 is greater than the refractive index of the second refractive portion 542. The second refractive portion 542 includes a plurality of sub-refractive portions. The plurality of sub-refractive portions are arranged in the first refractive portion 541 at intervals along the XY plane and are connected to the first refractive portion 541. The first refractive portion 541 is arranged on the outer surface of the second refractive portion 542 and covers the second refractive portion 542 in the Z direction. That is, the orthographic projection of the first refractive portion 541 along the Z direction completely covers the second refractive portion 542. In addition, the top surface of the first refractive portion 541 is located in the positive direction of the Z axis of the top surface of the second refractive portion 542, and the bottom surface of the first refractive portion 541 is flush with the bottom surface of the second refractive portion 542. It should be explained that the top surface refers to the surface facing the positive direction of the Z axis, and the bottom surface refers to the surface facing the negative direction of the Z axis.

[0099] The light extraction layer 54 is disposed between the polarizing layer 52 and the cover plate 55, and is stacked with the polarizing layer 52 and the cover plate 55 along the Z direction. The bottom surface of the second refractive portion 542 faces the top surface of the polarizing layer 52. In this embodiment, by disposing the light extraction layer 54 between the polarizing layer 52 and the cover plate 55, the outgoing light originally confined inside the display screen 100 can be emitted outside the display screen 100, thereby improving the light extraction efficiency of the display screen 100, and improving the display effect and visual comfort of the display screen 100.

[0100] Please continue reading Figure 2 , the cover plate 55 is made of a transparent material. In this embodiment, the cover plate 55 is made of glass. In other embodiments, the cover plate 55 can also be made of a transparent plastic material.

[0101] The cover plate 55 is stacked on the side of the polarizing layer 52 facing away from the touch layer 51, and is fixedly connected to the polarizing layer 52. In this embodiment, by providing the cover plate 55, the structures located on the inner side of the cover plate 55 (such as the polarizing layer 52, the touch layer 51, the blue light absorbing layer 40 and the display layer 20, etc.) can be protected to prevent the touch layer 51, the blue light absorbing layer 40 and the display layer 20 from being damaged, thereby improving the durability of the display screen 100. At the same time, the use of a transparent material to prepare the cover plate 55 will not affect the display of the display screen 100, and the outgoing light emitted by the display layer 20 can be emitted through the cover plate 55, and the user can see the image, picture or video displayed by the display layer 20 through the light-transmitting cover plate 55.

[0102] like Figure 2As shown, the display screen 100 further includes a second adhesive layer 56. In this embodiment, the second adhesive layer 56 is an OCA optical adhesive. In other embodiments, the second adhesive layer 56 may also be an OCR optical adhesive. The second adhesive layer 56 is bonded between the cover plate 55 and the polarizing layer 52, and is fixedly connected to the cover plate 55 and the polarizing layer 52. In this embodiment, OCA optical adhesive is used as the second adhesive layer 56, so that the second adhesive layer 56 can achieve a fixed connection between the cover plate 55 and the polarizing layer 52 while not affecting the display effect of the display layer 20.

[0103] In one embodiment, the blue light absorbing layer 40 may also be bonded between the touch layer 51 and the polarizing layer 52, and the first adhesive layer 53 may be bonded between the encapsulation layer 30 and the touch layer 51. Alternatively, the blue light absorbing layer 40 may also be disposed between the polarizing layer 52 and the cover plate 55, and the second adhesive layer 56 may be bonded between the encapsulation layer 30 and the touch layer 51. The blue light absorbing layer 40 may absorb harmful blue light with a wavelength of 420nm to 435nm in the outgoing light emitted by the display layer 20, and the absorption rate of the blue light absorbing layer 40 to the harmful blue light is about 90%. The half-peak width of the blue light absorption spectrum of the blue light absorbing layer 40 is about 15nm.

[0104] That is to say, any one of the adhesive layers between the encapsulation layer 30 and the touch layer 51, between the touch layer 51 and the polarizing layer 52, and between the polarizing layer 52 and the cover plate 55 can be replaced by an adhesive layer having a blue light absorbing function. Figure 2 The blue light absorbing layer 40 in the illustrated embodiment is replaced so that the display screen 100 has a blue light absorbing property.

[0105] See also Figure 6 , Figure 6 yes Figure 1 The display screen 100 in the electronic device 200 is a schematic diagram of a partial cross-section structure in the second embodiment.

[0106] This embodiment and Figure 2 The difference between the embodiment shown is that, in this embodiment, the blue light absorbing layer 40 includes a first blue light absorbing layer 401 and a second blue light absorbing layer 402. The first blue light absorbing layer 401 is bonded between the encapsulation layer 30 and the touch layer 51, and the second blue light absorbing layer 402 is bonded between the touch layer 51 and the polarizing layer 52. In addition, in this embodiment, no blue light absorbing layer 401 is provided. Figure 2 The first adhesive layer 53 in the illustrated embodiment.

[0107] The structure of the first blue light absorbing layer 401 is similar to Figure 2 The structure of the blue light absorbing layer 40 in the display screen 100 is the same or similar. The first blue light absorbing layer 401 can absorb harmful blue light in the first wavelength band. The structure of the second blue light absorbing layer 402 is the same or similar. Figure 2The structure of the blue light absorbing layer 40 in the display screen 100 is the same or similar. The second blue light absorbing layer 402 can absorb harmful blue light in the second wavelength band. The first wavelength band and the second wavelength band are both within the range of 400nm to 455nm, or within the range of 430nm to 450nm, or within the range of 420nm to 435nm.

[0108] In this embodiment, the blue light absorber in the first blue light absorbing layer 401 is different from the blue light absorber in the second blue light absorbing layer 402. The first wavelength band is different from the second wavelength band and does not overlap.

[0109] When harmful blue light in the output light emitted by the display layer 20 passes through the first blue light absorbing layer 401, harmful blue light in the first wavelength band is absorbed by the first blue light absorbing layer 401, and harmful blue light in the second wavelength band passes through the first blue light absorbing layer 401 and is emitted to the second blue light absorbing layer 402. When harmful blue light in the second wavelength band passes through the second blue light absorbing layer 402, it is absorbed by the second blue light absorbing layer 402, thereby achieving absorption of harmful blue light in the first wavelength band and the second wavelength band.

[0110] The absorption rate of the first blue light absorbing layer 401 to harmful blue light is about 90%, and the half-peak width of the blue light absorption spectrum of the first blue light absorbing layer 401 is about 15nm. The absorption rate of the second blue light absorbing layer 402 to harmful blue light is about 90%, and the half-peak width of the blue light absorption spectrum of the second blue light absorbing layer 402 is about 15nm.

[0111] In this embodiment, by providing a first blue light absorbing layer 401 and a second blue light absorbing layer 402 that can absorb harmful blue light of different wavelengths, the blue light absorbing layer 40 can effectively absorb harmful blue light of different wavelengths, thereby expanding the wavelength range of the display screen 100 absorbing harmful blue light, improving the absorption efficiency of harmful blue light, further reducing or even avoiding the harmful blue light generated by the display layer 20 from being emitted to the outside of the display screen 100, and reducing or even avoiding the damage of harmful blue light to the human eye.

[0112] In one embodiment, the blue light absorber 42 in the first blue light absorbing layer 401 and the blue light absorber 42 in the second blue light absorbing layer 402 may also be the same. The first wavelength band overlaps with the second wavelength band. The harmful blue light in the emitted light emitted by the display layer 20 passes through the first blue light absorbing layer 401, part of the harmful blue light is absorbed by the first blue light absorbing layer 401, and part of the harmful blue light passes through the first blue light absorbing layer 401 and is emitted to the second blue light absorbing layer 402. The harmful blue light emitted to the second blue light absorbing layer 402 is absorbed by the second blue light absorbing layer 402 when passing through the second blue light absorbing layer 402.

[0113] In this embodiment, the first blue light absorbing layer 401 can absorb harmful blue light with a main wavelength of 420nm to 435nm, and the absorption rate of the first blue light absorbing layer 401 to harmful blue light is about 90%. The half-peak width of the blue light absorption spectrum of the first blue light absorbing layer 401 is about 15nm. The second blue light absorbing layer 402 can absorb harmful blue light with a main wavelength of 420nm to 435nm, and the absorption rate of the second blue light absorbing layer 402 to harmful blue light is about 90%. The half-peak width of the blue light absorption spectrum of the second blue light absorbing layer 402 is about 15nm.

[0114] In this embodiment, by providing two layers of blue light absorption layer 40, the harmful blue light emitted by the display layer 20 can be absorbed by the first blue light absorption layer 401 and the second blue light absorption layer 402 in sequence, thereby improving the absorption effect of harmful blue light, further reducing the harmful blue light emitted to the outside of the display screen 100, and reducing or even avoiding the damage of harmful blue light to the human eye.

[0115] In one embodiment, the blue light absorber 42 in the first blue light absorbing layer 401 is partially identical to and partially different from the blue light absorber 42 in the second blue light absorbing layer 402. The first wavelength band partially overlaps with the second wavelength band, but partially does not overlap.

[0116] The harmful blue light emitted by the display layer 20 passes through the first blue light absorption layer 401 and the second blue light absorption layer 402 in sequence, the harmful blue light in the first wavelength band is absorbed by the first blue light absorption layer 401, the harmful blue light in the second wavelength band is absorbed by the second blue light absorption layer 402, and the harmful blue light in the wavelength band where the first wavelength band and the second wavelength band overlap is absorbed in sequence by the first blue light absorption layer 401 and the second blue light absorption layer 402. The display screen 100 provided in this embodiment can, on the one hand, expand the wavelength range of the display screen 100 absorbing harmful blue light, and on the other hand, improve the absorption effect of harmful blue light, further reduce the harmful blue light emitted to the outside of the display screen 100, and reduce or even avoid the harmful blue light from causing damage to human eyes.

[0117] See also Figure 7 , Figure 7 yes Figure 1 The display screen 100 in the electronic device 200 is a schematic diagram of a partial cross-section structure in a third embodiment.

[0118] This embodiment and Figure 5 The difference between the embodiment shown is that, in this embodiment, the first blue light absorbing layer 401 is bonded between the encapsulation layer 30 and the touch layer 51, and the second blue light absorbing layer 402 is bonded between the light extraction layer 54 and the cover plate 55. The display screen 100 includes a first adhesive layer 53, and the first adhesive layer 53 is bonded between the touch layer 51 and the polarizing layer 52. In addition, in this embodiment, no Figure 2 The second glue layer 56 in the illustrated embodiment.

[0119] In one embodiment, the first blue light absorbing layer 401 is bonded between the touch layer 51 and the polarizing layer 52, and the second blue light absorbing layer 402 is bonded between the polarizing layer 52 and the cover plate 55. The display screen 100 includes a third adhesive layer, which is bonded between the encapsulation layer 30 and the touch layer 51. Figure 2 The first adhesive layer 53 and the second adhesive layer 56 in the illustrated embodiment.

[0120] That is to say, any two of the adhesive layers between the encapsulation layer 30 and the touch layer 51, the adhesive layer between the touch layer 51 and the polarizing layer 52, and the adhesive layer between the polarizing layer 52 and the cover plate 55 can be replaced by adhesive layers having a blue light absorption function. Figure 2 The blue light absorbing layer 40 in the illustrated embodiment is replaced to improve the blue light absorbing performance of the display screen 100 .

[0121] See also Figure 8 , Figure 8 yes Figure 1 The display screen 100 in the electronic device 200 is a schematic diagram of a partial cross-section structure in a fourth embodiment.

[0122] This embodiment and Figure 2 The difference between the embodiment shown is that, in this embodiment, the blue light absorbing layer 40 includes a first blue light absorbing layer 401, a second blue light absorbing layer 402 and a third blue light absorbing layer 40. The first blue light absorbing layer 401 is bonded between the encapsulation layer 30 and the touch layer 51, the second blue light absorbing layer 402 is bonded between the touch layer 51 and the polarizing layer 52, and the third blue light absorbing layer 40 is bonded between the polarizing layer 52 and the cover plate 55. In addition, in this embodiment, no blue light absorbing layer 401 is bonded between the encapsulation layer 30 and the touch layer 51, the second blue light absorbing layer 402 is bonded between the touch layer 51 and the polarizing layer 52, and the third blue light absorbing layer 40 is bonded between the polarizing layer 52 and the cover plate 55. Figure 2 In the embodiment shown, the first adhesive layer 53 and the second adhesive layer 56 are replaced by adhesive layers with blue light absorption function, that is, the adhesive layer between the encapsulation layer 30 and the touch layer 51, the adhesive layer between the touch layer 51 and the polarizing layer 52, and the adhesive layer between the polarizing layer 52 and the cover plate 55.

[0123] Among them, any two absorption bands among the absorption band of the first blue light absorption layer 401 , the absorption band of the second blue light absorption layer 402 and the absorption band of the third blue light absorption layer 40 may overlap, may not overlap at all, or may overlap partially.

[0124] In this embodiment, the first blue light absorbing layer 401 can absorb harmful blue light with a main wavelength of 420nm to 435nm, and the absorption rate of the first blue light absorbing layer 401 to harmful blue light is about 90%, and the half-peak width of the blue light absorption spectrum of the first blue light absorbing layer 401 is about 15nm. The second blue light absorbing layer 402 can absorb harmful blue light with a main wavelength of 420nm to 435nm, and the absorption rate of the second blue light absorbing layer 402 to harmful blue light is about 90%, and the half-peak width of the blue light absorption spectrum of the second blue light absorbing layer 402 is about 15nm. The third blue light absorbing layer 403 can absorb harmful blue light with a main wavelength of 420nm to 435nm, and the absorption rate of the third blue light absorbing layer 403 to harmful blue light is about 90%, and the half-peak width of the blue light absorption spectrum of the third blue light absorbing layer 403 is about 15nm.

[0125] In this embodiment, by setting three layers of blue light absorption layer 40, the harmful blue light emitted by the display layer 20 can be absorbed by the first blue light absorption layer 401, the second blue light absorption layer 402 and the third blue light absorption layer 40 in sequence, thereby further improving the absorption effect of harmful blue light, reducing the harmful blue light emitted to the outside of the display screen 100, and reducing or even avoiding the damage of harmful blue light to the human eye.

[0126] See also Fig. 9 , Fig. 9 yes Figure 1 The diagram is a partial cross-sectional structural diagram of the display screen 100 in the electronic device 200 in the fifth embodiment.

[0127] Fig. 9 The embodiment shown and Figure 2 The difference of the embodiment shown is that, in this embodiment, the display screen 100 includes a filter layer 60 and does not include Figure 2 Polarizing layer 52 in the illustrated embodiment.

[0128] The filter layer 60 is a color filter. The filter layer 60 is provided with a plurality of filter units. Each filter unit includes three filter points. The three filter points in each filter unit are a first filter point 61, a second filter point 62 and a third filter point 63. The first filter point 61, the second filter point 62 and the third filter point 63 are arranged at intervals. Among them, the first filter point 61 is red, and the first filter point 61 can filter other light except red light, that is, only red light can pass through the first filter point 61. The second filter point 62 is green, and the second filter point 62 can filter other light except green light, that is, only green light can pass through the second filter point 62. The third filter point 63 is blue, and the third filter point 63 can filter other light except blue light, that is, only blue light can pass through the third filter point 63.

[0129] The filter layer 60 is disposed on the side of the encapsulation layer 30 facing away from the display layer 20, and is connected to the encapsulation layer 30. The first filter points 61 are arranged in one-to-one correspondence with the first sub-pixel points 211, and are aligned one-to-one along the Z direction. The second filter points 62 are arranged in one-to-one correspondence with the second sub-pixel points 212, and are aligned one-to-one along the Z direction. The third filter points 63 are arranged in one-to-one correspondence with the third sub-pixel points 213, and are aligned one-to-one along the Z direction. That is, the color of the filter points is the same as the luminous color of the corresponding sub-pixel points.

[0130] In this embodiment, by providing a filter layer 60 on the outside of the encapsulation layer 30, the light emitted by the display layer 20 can be filtered, so that the display screen 100 can display normally. In addition, in this embodiment, a color filter is used instead of a polarizer, and there is no need to provide a polarizer, which improves the light transmittance of the display screen 100, improves the display effect of the display screen 100, and reduces the power consumption of the display screen 100.

[0131] The light extraction layer 54 is disposed on the side of the filter layer 60 facing away from the encapsulation layer 30 and is connected to the filter layer 60. Figure 2 The structures of the light extraction layer 54 in the illustrated embodiment may be the same or similar. The touch layer 51 is disposed on the side of the light extraction layer 54 facing away from the filter layer 60 and connected to the light extraction layer 54. The cover plate 55 is disposed on the side of the touch layer 51 facing away from the light extraction layer 54 and connected to the touch layer 51. That is, in the present embodiment, the substrate 10, the display layer 20, the encapsulation layer 30, the filter layer 60, the light extraction layer 54, the touch layer 51 and the cover plate 55 are sequentially stacked along the Z direction.

[0132] The blue light absorbing layer 40 is bonded between the light extraction layer 54 and the touch control layer 51. Figure 2 The structure of the blue light absorbing layer 40 is the same or similar. The blue light absorbing layer 40 shown in this embodiment can not only achieve the bonding performance, but also play the role of blue light absorption. The outgoing light emitted by the display layer 20 is irradiated to the filter layer 60 through the encapsulation layer 30, and then irradiated to the blue light absorbing layer 40 through the filter layer 60 and the light extraction layer 54. The harmful blue light in the outgoing light is absorbed by the blue light absorbing layer 40, and then emitted to the outside of the display screen 100 through the touch layer 51 and the cover plate 55.

[0133] In this embodiment, by setting a blue light absorption layer 40 between the light extraction layer 54 and the touch layer 51, harmful blue light in the output light emitted by the display layer 20 can be absorbed, thereby reducing or even preventing the harmful blue light from being emitted to the outside of the display screen 100, and further reducing or even preventing the harmful blue light from causing damage to the human eye.

[0134] In this embodiment, the display screen 100 further includes an optical adhesive layer 57. The optical adhesive layer 57 is bonded between the touch layer 51 and the cover plate 55. The optical adhesive layer 57 can be an OCA optical adhesive or an OCR optical adhesive.

[0135] In one embodiment, the blue light absorbing layer 40 may also be bonded between the touch layer 51 and the cover plate 55, and the optical adhesive layer 57 may be bonded between the light extraction layer 54 and the touch layer 51. The outgoing light emitted by the display layer 20 is irradiated to the filter layer 60 through the encapsulation layer 30, and then sequentially passes through the light extraction layer 54, the optical adhesive layer 57 and the touch layer 51 to irradiate the blue light absorbing layer 40. The harmful blue light in the outgoing light is absorbed by the blue light absorbing layer 40, and then is emitted to the outside of the display screen 100 through the cover plate 55. In this embodiment, by providing the blue light absorbing layer 40 between the touch layer 51 and the cover plate 55, the harmful blue light in the outgoing light emitted by the display layer 20 can be absorbed, thereby reducing or even preventing the harmful blue light from being emitted to the outside of the display screen 100, and further reducing or even preventing the harmful blue light from causing damage to the human eye.

[0136] That is to say, any one of the adhesive layers between the light extraction layer 54 and the touch layer 51 and the adhesive layer between the touch layer 51 and the cover plate 55 can be replaced by an adhesive layer having a blue light absorption function. Figure 2 The blue light absorbing layer 40 in the illustrated embodiment is replaced so that the display screen 100 has a blue light absorbing property.

[0137] See also Fig.10 , Fig.10 yes Figure 1 The diagram is a partial cross-sectional structural diagram of the display screen 100 in the electronic device 200 in the sixth embodiment.

[0138] This embodiment and Fig. 9 The difference of the embodiment shown is that the blue light absorbing layer 40 includes a first blue light absorbing layer 401 and a second blue light absorbing layer 402. The first blue light absorbing layer 401 is bonded between the light extraction layer 54 and the touch layer 51, and the second blue light absorbing layer 402 is bonded between the touch layer 51 and the cover plate 55. In addition, in this embodiment, no blue light absorbing layer 401 is provided. Fig. 9 The optical adhesive layer 57 in the illustrated embodiment. That is, the adhesive layer between the light extraction layer 54 and the touch layer 51 and the adhesive layer between the touch layer 51 and the cover plate 55 are replaced by adhesive layers with blue light absorption function. The absorption band of the first blue light absorption layer 401 and the absorption band of the second blue light absorption layer 402 and the absorption band of the third blue light absorption layer 40 may overlap, may not overlap at all, or may overlap partially.

[0139] In this embodiment, by providing two layers of blue light absorption layer 40, the harmful blue light emitted by the display layer 20 can be absorbed by the first blue light absorption layer 401 and the second blue light absorption layer 402 in sequence, thereby further improving the absorption effect of harmful blue light, reducing the harmful blue light emitted to the outside of the display screen 100, and reducing or even avoiding the damage of harmful blue light to the human eye.

[0140] See also Fig.11 , Fig.11 yes Figure 1 The diagram is a partial cross-sectional structural diagram of the display screen 100 in the electronic device 200 in the seventh embodiment.

[0141] This embodiment and Figure 2 The difference of the embodiment shown is that in this embodiment, the blue light absorbing layer 40 includes a substrate 41 and a blue light absorber 42, and the substrate 41 is a packaging material. Specifically, the substrate 41 is an acrylic material, a silicone material, or an epoxy resin material.

[0142] The blue light absorbing layer 40 is disposed on a side of the encapsulation layer 30 facing away from the display layer 20 , that is, disposed between the encapsulation layer 30 and the touch control layer 51 , and connected to the blue light absorbing layer 40 and the encapsulation layer 30 .

[0143] The outgoing light emitted by the display layer 20 is irradiated to the blue light absorbing layer 40 through the encapsulation layer 30 . The harmful blue light in the outgoing light is absorbed by the blue light absorbing layer 40 and then is emitted to the outside of the display screen 100 through the touch layer 51 , the polarizing layer 52 and the cover plate 55 .

[0144] In this embodiment, by setting a blue light absorption layer 40 between the encapsulation layer 30 and the touch layer 51, harmful blue light in the output light emitted by the display layer 20 can be absorbed, thereby reducing or even preventing the harmful blue light from being emitted to the outside of the display screen 100, and further reducing or even preventing the harmful blue light from causing damage to the human eye.

[0145] In this embodiment, the thickness of the first encapsulation layer 31 is 0.1 μm to 0.4 μm, and the thickness of the third encapsulation layer 33 is 0.05 μm to 0.4 μm.

[0146] It should be noted that when the thickness of the inorganic encapsulation layer 30 is 0.3 μm, the stress is 100 MPa to 800 MPa. In the prior art, the thickness of the inorganic encapsulation layer 30 is about 1 μm, and the stress is about 100 MPa to 1000 MPa. When the display screen 100 is bent or curved, the inorganic encapsulation layer 30 generates a large internal stress, which may cause cracks in the inorganic encapsulation layer 30, or cause the inorganic encapsulation layer 30 to fall off, that is, cause peeling at the interface of the encapsulation layer 30, that is, peeling between the encapsulation layer 30 and the display layer 20, causing the display screen 100 to be damaged or fail.

[0147] In this embodiment, the blue light absorbing layer 40 not only plays a role in absorbing blue light, but also plays a role in encapsulation. In this embodiment, by providing the blue light absorbing layer 40 with an encapsulation function on the surface of the encapsulation layer 30, the thickness of the first encapsulation layer 31 can be reduced to 1 / 10 to 2 / 5 of the original thickness, and the thickness of the third encapsulation layer 33 can be reduced to 1 / 20 to 2 / 5 of the original thickness. The original thickness here refers to the thickness of the inorganic encapsulation layer 30 in the prior art, that is, about 1 μm.

[0148] The display screen 100 provided in this embodiment can improve the encapsulation effect of the display layer 20 by providing the blue light absorption layer 40. In addition, the display screen 100 provided in this embodiment can reduce the thickness of the first encapsulation layer 31 and the third encapsulation layer 33 while ensuring the encapsulation effect, that is, reduce the thickness of the inorganic encapsulation layer 30, thereby reducing the bending stress of the first encapsulation layer 31 and the third encapsulation layer 33, improving the bending resistance and bending resistance of the display screen 100, and preventing the first encapsulation layer 31 and the third encapsulation layer 33 from cracking or peeling when bending.

[0149] It should be explained that the peeling mentioned here refers to peeling at the interface. Avoiding peeling of the first encapsulation layer 31 means avoiding peeling between the first encapsulation layer 31 and the display layer 20, or avoiding peeling between the first encapsulation layer 31 and the second encapsulation layer 32. Avoiding peeling of the third encapsulation layer 33 means avoiding peeling between the third encapsulation layer 33 and the blue light absorption layer 40, or avoiding peeling between the third encapsulation layer 33 and the second encapsulation layer 32.

[0150] In addition, in this embodiment, a blue light absorbing layer 40 having an encapsulation function is provided to reduce the thickness of the first encapsulation layer 31 and the third encapsulation layer 33, so that the thickness of the second encapsulation layer 32 can be adjusted and the second encapsulation layer 32 has more design margins, thereby reducing the design difficulty of the display screen 100.

[0151] like Fig.11 As shown, the display screen 100 further includes a transition layer 70. The transition layer 70 is disposed between the encapsulation layer 30 and the touch layer 51, and is connected to the encapsulation layer 30 and the touch layer 51. The transition layer 70 can further realize the encapsulation of the display layer 20, thereby improving the encapsulation effect of the display screen 100. The transition layer 70 can also protect the blue light absorbing layer 40, preventing the blue light absorbing layer 40 from directly contacting the touch layer 51, causing the organic material in the touch layer 51 to swell with the organic material in the blue light absorbing layer 40, thereby causing optical problems and affecting the display effect of the display screen 100.

[0152] In this embodiment, the transition layer 70 is made of silicon nitride (SiN xIn other embodiments, the transition layer 70 may also be made of silicon oxynitride (SiO x N y ) or silicon oxide (SiO x ). In this embodiment, the thickness of the transition layer 70 is 0.05 μm to 0.3 μm. In other embodiments, the thickness of the transition layer 70 may be slightly less than 0.05 μm or slightly greater than 0.3 μm.

[0153] See also Fig.12 , Fig.12 yes Figure 1 The diagram is a partial cross-sectional structural diagram of the display screen 100 in the electronic device 200 in the eighth embodiment.

[0154] This embodiment and Fig.11 The difference of the embodiment shown is that in this embodiment, the blue light absorbing layer 40 is disposed between the first encapsulation layer 31 and the third encapsulation layer 33, and is connected to the first encapsulation layer 31 and the third encapsulation layer 33. In addition, the display screen 100 in this embodiment does not include Fig.11 The second encapsulation layer 32 and transition layer 70 in the illustrated embodiment.

[0155] The outgoing light emitted by the display layer 20 passes through the first encapsulation layer 31 to irradiate the blue light absorbing layer 40 . After the harmful blue light in the outgoing light is absorbed by the blue light absorbing layer 40 , it passes through the third encapsulation layer 33 , the touch layer 51 , the polarizing layer 52 and the cover plate 55 to be emitted to the outside of the display screen 100 .

[0156] In this embodiment, by setting a blue light absorption layer 40 between the first encapsulation layer 31 and the third encapsulation layer 33, harmful blue light in the output light emitted by the display layer 20 can be absorbed, thereby reducing or even preventing the harmful blue light from being emitted to the outside of the display screen 100, and further reducing or even preventing the harmful blue light from causing damage to the human eye.

[0157] It can be understood that the blue light absorbing layer 40 in this embodiment is an organic encapsulation layer with blue light absorbing performance, and the blue light absorbing layer 40 can play both encapsulation and blue light absorbing roles. In this embodiment, the blue light absorbing layer 40 is used to replace the organic encapsulation layer in the encapsulation layer 30, that is, to replace Fig.11 The second encapsulation layer 32 in the illustrated embodiment can realize both blue light absorption and encapsulation functions, thereby simplifying the structure of the display screen 100 and the manufacturing process of the display screen 100 . There is no need to additionally set a layer structure with blue light absorption performance, thereby reducing the thickness of the display screen 100 .

[0158] The above are only some embodiments and implementation methods of the present application, and the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by any person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A display screen, characterized in that: The display screen comprises: a substrate, a display layer and a blue light absorbing layer; The display layer includes a back surface and a display surface, the back surface and the display surface are arranged opposite to each other along the thickness direction of the display layer, and along the thickness direction of the display screen, the display layer and the substrate are stacked, and the back surface faces the substrate; the display layer is used to emit outgoing light, the outgoing light includes harmful blue light, and the outgoing light is emitted through the display surface; The blue light absorbing layer includes a substrate and a blue light absorber, wherein the blue light absorber is dispersed in the substrate. Along the thickness direction of the display screen, the blue light absorbing layer and the display layer are stacked and located on a side close to the display surface, and the blue light absorbing layer covers the display surface; the blue light absorber is used to absorb at least part of the harmful blue light, wherein the harmful blue light is blue light with a wavelength of 400nm to 455nm.

2. The display screen according to claim 1, characterized in that: The blue light absorber is used for absorbing the harmful blue light with a wavelength of 410nm to 450nm.

3. The display screen according to claim 1 or 2, characterized in that: The harmful blue light transmittance of the blue light absorbing layer is less than or equal to 10%.

4. The display screen according to claim 3, characterized in that: The blue light absorber includes an organic small molecule compound that can absorb blue light, and the organic small molecule compound that can absorb blue light is any one or more of benzotriazole, benzophenone, and triazine. Alternatively, the organic small molecule compound that can absorb blue light is an organic small molecule compound containing one or more of benzotriazole functional groups, benzophenone functional groups, and triazine functional groups.

5. The display screen according to claim 4, characterized in that: The mass ratio of the organic small molecule compound capable of absorbing blue light to the substrate is 1:200 to 1:

10.

6. The display screen according to claim 3, characterized in that: The blue light absorber includes an inorganic substance capable of absorbing blue light, and the inorganic substance capable of absorbing blue light is any one or more of graphene oxide, titanium oxide or zirconium oxide.

7. The display screen according to claim 6, characterized in that: The mass ratio of the inorganic substance capable of absorbing blue light to the substrate is 1:20 to 1:2.

5.

8. The display screen according to claim 6, characterized in that: The blue light absorber includes an organic small molecule compound capable of absorbing blue light and an inorganic substance capable of absorbing blue light. The mass ratio of the organic small molecule compound capable of absorbing blue light to the substrate is 1:200 to 1:10, and the mass ratio of the inorganic substance capable of absorbing blue light to the substrate is 1:20 to 1:2.

5.

9. The display screen according to any one of claims 4 to 8, characterized in that: The display screen further includes an encapsulation layer, a touch layer, a polarizing layer and a cover plate. Along the thickness direction of the display screen, the encapsulation layer, the touch layer, the polarizing layer and the cover plate are stacked in sequence and are all located on a side of the display layer close to the display surface. The encapsulation layer faces the display surface and is connected to the display surface.

10. The display screen according to claim 9, characterized in that: The substrate is optical glue, the blue light absorbing layer is bonded between the encapsulation layer and the touch layer, or the blue light absorbing layer is bonded between the touch layer and the polarizing layer, or the blue light absorbing layer is bonded between the polarizing layer and the cover plate.

11. The display screen according to claim 9, characterized in that: The substrate is an optical adhesive, and the blue light absorbing layer includes a first blue light absorbing layer and a second blue light absorbing layer; The first blue light absorbing layer is bonded between the encapsulation layer and the touch layer, and the second blue light absorbing layer is bonded between the touch layer and the polarizing layer; Or the first blue light absorbing layer is bonded between the encapsulation layer and the touch layer, and the second blue light absorbing layer is bonded between the polarizing layer and the cover plate; or the first blue light absorbing layer is bonded between the touch layer and the polarizing layer, and the second blue light absorbing layer is bonded between the polarizing layer and the cover plate.

12. The display screen according to claim 9, characterized in that: The substrate is optical glue, and the blue light absorbing layer includes a first blue light absorbing layer, a second blue light absorbing layer and a third blue light absorbing layer; the first blue light absorbing layer is bonded between the encapsulation layer and the touch layer, the second blue light absorbing layer is bonded between the touch layer and the polarizing layer, and the third blue light absorbing layer is bonded between the polarizing layer and the cover plate.

13. The display screen according to claim 9, characterized in that: The substrate is an organic packaging material, and the blue light absorption layer is arranged between the packaging layer and the touch layer, and is connected to the packaging layer and the touch layer.

14. The display screen according to claim 13, characterized in that: The encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer. Along the thickness direction of the display screen, the first inorganic encapsulation layer, the organic encapsulation layer, and the second inorganic encapsulation layer are stacked in sequence, and the first inorganic encapsulation layer faces the display layer and is connected to the display layer, and the second inorganic encapsulation layer faces the blue light absorbing layer and is connected to the blue light absorbing layer; the thickness of the first inorganic encapsulation layer is 0.1μm to 0.4μm, and the thickness of the second inorganic encapsulation layer is 0.05μm to 0.4μm.

15. The display screen according to claim 13 or 14, characterized in that: The display screen further comprises a transition layer, the material of which is silicon nitride, silicon oxynitride, or silicon oxide; the transition layer is arranged between the blue light absorbing layer and the touch layer, and is connected to the blue light absorbing layer and the touch layer.

16. The display screen according to claim 9, characterized in that: The encapsulation layer includes a first inorganic encapsulation layer and a second inorganic encapsulation layer, and the first inorganic encapsulation layer and the second inorganic encapsulation layer are stacked along the thickness direction of the display screen; the substrate is an organic encapsulation material, and the blue light absorption layer is arranged between the first inorganic encapsulation layer and the second inorganic encapsulation layer.

17. The display screen according to any one of claims 4 to 8, characterized in that: The display screen includes an encapsulation layer, a filter layer, a touch layer and a cover plate. Along the thickness direction of the display screen, the encapsulation layer, the filter layer, the touch layer and the cover plate are stacked in sequence and are all located on a side of the display layer close to the display surface. The encapsulation layer faces the display surface and is connected to the display surface.

18. The display screen according to claim 17, characterized in that: The substrate is optical glue, the blue light absorbing layer is bonded between the filter layer and the touch layer, or the blue light absorbing layer is bonded between the touch layer and the cover plate.

19. The display screen according to claim 17, characterized in that: The substrate is optical glue, and the blue light absorbing layer includes a first blue light absorbing layer and a second blue light absorbing layer; the first blue light absorbing layer is bonded between the filter layer and the touch layer, and the second blue light absorbing layer is bonded between the touch layer and the cover plate.

20. An electronic device, characterized in that: It comprises a shell and the display screen according to any one of claims 1 to 19, wherein the display screen is mounted on the shell, and the substrate is located on a side close to the shell.

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