Display device

Abstract

The invention provides a display device which comprises a display module and a camera, the display module comprises a display area, a transition area and a hole area, the transition area is arranged between the hole area and the display area, the transition area is provided with a light filtering part, and the camera is arranged on the side, away from a display function layer, of a substrate. The orthographic projection of the hole area on the target plane is located in the orthographic projection of the camera on the target plane, the orthographic projection of the transition area on the target plane is located in the orthographic projection of the camera on the target plane, the filtering part in the transition area is used for filtering part of ambient light entering the camera, and the imaging effect of the display device can be optimized. Meanwhile, the size of the hole area is reduced, and the screen-to-body ratio of the display module is increased.

Description

Technical Field

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

[0002] OLED (Organic Light-Emitting Diode) is an active light-emitting device with a sandwich structure consisting of multiple organic layers and electrodes on both sides. Currently, displays based on AMOLED (Active-Matrix Organic Light-Emitting Diode) have been commercialized in fields such as smartphones, watches, and laptops.

[0003] However, the performance of existing display products needs to be improved. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a display device that is conducive to improving the display effect.

[0005] Based on the above objectives, the present application provides a display device, including a display module and a camera, wherein the display module includes a display area, a transition area, and a hole area, wherein the transition area is arranged between the display area and the hole area, and the display module further includes:

[0006] substrate;

[0007] A display function layer is disposed on one side of the substrate and is at least partially located in the display area;

[0008] a filter layer, disposed on a side of the display function layer away from the substrate, the filter layer comprising a filter portion, and the filter portion is located in the transition region;

[0009] The camera is arranged on a side of the substrate away from the display function layer, the orthographic projection of the hole area on the target plane is located within the orthographic projection of the camera on the target plane, the orthographic projection of the transition area on the target plane is located within the orthographic projection of the camera on the target plane, and the target plane is the plane where the surface of the substrate close to the display function layer is located.

[0010] In one embodiment, the display function layer includes a plurality of light-emitting devices and a pixel definition layer, the pixel definition layer defines a plurality of pixel openings, and the light-emitting devices are at least partially located in corresponding pixel openings;

[0011] Preferably, the light-emitting device comprises a first electrode, a light-emitting functional layer, and a second electrode sequentially stacked in a direction away from the substrate, and the second electrodes of the plurality of light-emitting devices are interconnected and continuously arranged;

[0012] Preferably, the first electrode comprises an anode, and the second electrode comprises a cathode.

[0013] In one embodiment, the transition area is an annular transition area, the annular transition area is arranged around the hole area, and the display area is arranged around the annular transition area;

[0014] Preferably, the display module also includes an annular isolation area, which is arranged around the annular transition area and located between the annular transition area and the display area. The pixel definition layer is provided with an annular isolation groove, which is located in the annular isolation area and arranged around the annular transition area.

[0015] In one embodiment, the pixel definition layer is partially located in the transition region.

[0016] In one embodiment, the display module further includes:

[0017] a light shielding layer disposed between the filter layer and the substrate and at least partially located in the display area, the light shielding layer comprising a plurality of light-transmitting openings; the filter layer comprising a plurality of light-filtering units, the orthographic projections of the light-filtering units on the substrate being at least partially located within the orthographic projections of the corresponding light-transmitting openings on the substrate;

[0018] Preferably, the orthographic projection of the pixel opening on the target plane overlaps with the orthographic projection of the light-transmitting opening on the target plane;

[0019] Preferably, the orthographic projection of the light shielding layer on the target plane overlaps with the orthographic projection of the pixel definition layer on the target plane;

[0020] The display module further includes:

[0021] an encapsulation layer, wherein the encapsulation layer is partially disposed between the display function layer and the light shielding layer, and partially disposed between the display function layer and the filter layer, and the encapsulation layer is partially located in the annular isolation groove;

[0022] Preferably, the orthographic projection of the filter portion on the target plane does not overlap with the orthographic projection of the encapsulation layer on the target plane;

[0023] Preferably, the light filtering portion is close to a surface of the pixel definition layer and contacts the pixel definition layer, and the light filtering portion is away from a sidewall of the hole region and contacts the encapsulation layer.

[0024] In one embodiment, the light-emitting device includes a red light-emitting device, a green light-emitting device and a blue light-emitting device; the filtering unit includes a red light filter, a blue light filter and a green light filter, the orthographic projection of the red light-emitting device on the substrate is located within the orthographic projection of the corresponding red light filter on the substrate, the orthographic projection of the green light-emitting device on the substrate is located within the orthographic projection of the corresponding green light filter on the substrate, and the orthographic projection of the blue light-emitting device on the substrate is located within the orthographic projection of the corresponding blue light filter on the substrate.

[0025] In one embodiment, the encapsulation layer includes a first encapsulation layer, a second encapsulation layer, and a third encapsulation layer stacked in sequence in a direction away from the substrate, the first encapsulation layer and the third encapsulation layer are inorganic layers, and the second encapsulation layer is an organic layer.

[0026] In one embodiment, the display module further includes a planarization layer, wherein the planarization layer is partially disposed between the encapsulation layer and the filter layer, and partially disposed between the encapsulation layer and the light shielding layer;

[0027] Preferably, the planarization layer is partially located in the annular transition zone;

[0028] Preferably, a portion of the planarization layer located in the annular transition region contacts the pixel definition layer.

[0029] In one embodiment, the base plate includes a substrate and a plurality of metal layers stacked on the substrate, and the orthographic projections of the metal layers on the substrate do not overlap with the transition region.

[0030] In one embodiment, the filter portion includes one or more of a red light filter, a blue light filter, and a green light filter.

[0031] Compared to the prior art, the display device provided by this application includes a display module and a camera. The display module includes a display area, a transition area, and a hole area. The transition area is arranged between the hole area and the display area. The transition area is provided with a filter. The camera is arranged on the side of the substrate away from the display function layer. The orthographic projection of the hole area on the target plane is located within the orthographic projection of the camera on the target plane. The orthographic projection of the transition area on the target plane is located within the orthographic projection of the camera on the target plane. The filter in the transition area is used to filter part of the ambient light entering the camera, which can optimize the imaging effect of the display device. At the same time, it is beneficial to reduce the size of the hole area and increase the screen-to-body ratio of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in this application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are merely embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0033] Figure 1 A schematic diagram of a display device provided in one embodiment of the present application;

[0034] Figure 2 for Figure 1 A cross-sectional view of the display device along section AA is provided;

[0035] Figure 3 for Figure 1 Another cross-sectional view of the display device along section AA is provided;

[0036] Figure 4 A schematic diagram of a display device provided in another embodiment of the present application;

[0037] Figure 5 for Figure 4 A cross-sectional view of the display device along section BB is provided;

[0038] Figure 6 for Figure 4 Another cross-sectional view of the display device along section BB is provided;

[0039] Figure 7 for Figure 4 Another cross-sectional view of the display device along section BB is provided.

[0040] Marking Description:

[0041] 100, display device; 110, display area; 120, transition area; 130, hole area; 140, annular isolation area; 200, camera;

[0042] 1. Substrate;

[0043] 2. Display function layer; 21. Pixel definition layer; 211. Annular isolation groove; 22. Light-emitting device; 221. First electrode; 222. Light-emitting function layer; 223. Second electrode;

[0044] 3. Light-shielding layer; 31. Light-transmitting opening;

[0045] 4. Filter layer; 41. Filter unit; 42. Filter portion;

[0046] 5. Encapsulation layer;

[0047] 6. Planarization layer. DETAILED DESCRIPTION

[0048] In order to make the objectives, technical solutions and advantages of this application more clear, this application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0049] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in the embodiments of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0050] AMOLED display panel is one of the hot topics in the current display panel research field. AMOLED display panel has the advantages of low energy consumption, low cost, self-luminescence, wide viewing angle and fast response speed.

[0051] Current AMOLED display panels typically utilize PLP (Pol-Less Panel, without polarizer) technology to improve light transmittance and reduce panel thickness. Integrating color filters (CF) into the encapsulation layer (Color On Encapsulation, COE) is one of the future development directions for AMOLED. This replaces polarizers, making AMOLED thinner and more flexible. Furthermore, the excellent transmittance of color filters reduces power consumption during operation, increasing the overall battery life of the device.

[0052] Please refer to Figure 1 and 2 As shown, a display device provided in an embodiment of the present application includes a display module and a camera 200 . The display module includes a display area 110 , a transition area 120 and a hole area 130 . The transition area 120 is located between the hole area 130 and the display area 110 .

[0053] The display module also includes a substrate 1, a display function layer 2 and a filter layer 4. The display function layer 2 is arranged on one side of the substrate 1 and is at least partially located in the display area 110; the filter layer 4 is arranged on the side of the display function layer 2 away from the substrate 1, and the filter layer 4 includes a filter portion 42, which is located in the transition area 120.

[0054] In which, the camera 200 is arranged on the side of the substrate 1 away from the display function layer 2, the hole area 130 is located within the orthographic projection of the camera 200 on the target plane, and the orthographic projection of the transition area 120 on the target plane is located within the orthographic projection of the camera 200 on the target plane, wherein the target plane is the plane where the surface of the substrate 1 close to the display function layer 2 is located.

[0055] The width of the transition area 120 is d1, and the diameter of the hole area 130 is d2.

[0056] The display device provided in this embodiment includes a display module and a camera 200. The display module includes a display area 110, a transition area 120, and a hole area 130. The transition area 120 is disposed between the hole area 130 and the display area 110. The transition area 120 is provided with a filter portion 42. The camera 200 is disposed on a side of the substrate 1 away from the display function layer 2. The orthographic projection of the hole area 130 on the target plane is located within the orthographic projection of the camera 200 on the target plane. The orthographic projection of the transition area 120 on the target plane is located within the orthographic projection of the camera 200 on the target plane. The filter portion 42 in the transition area 120 filters part of the ambient light entering the camera 200, thereby optimizing the imaging effect of the display device. At the same time, it is beneficial to reduce the size of the hole area 130 and increase the screen-to-body ratio of the display module.

[0057] Specifically, when the image captured by camera 200 is greenish, the filter 42 in transition region 120 filters out some of the green light. When the image captured by camera 200 is bluish, the filter 42 in transition region 120 filters out some of the blue light. When the image captured by camera 200 is reddish, the filter 42 in transition region 120 filters out some of the red light, thereby optimizing the imaging effect of the display device. Furthermore, the display device in this embodiment includes a mobile phone, VR equipment, computer, television, in-vehicle display device, etc.

[0058] In one embodiment, the substrate 1 includes the following structure:

[0059] Substrate: Typically made of glass, it offers excellent flatness, high hardness, and strength, providing stable physical support for the entire array substrate. Glass substrates also possess excellent insulation and chemical stability, ensuring they do not chemically react with other film layers during display panel manufacturing and use, potentially impacting display performance.

[0060] Buffer layer: Typically made of materials such as silicon nitride or silicon oxide. Its primary function is to prevent impurities in the glass substrate, such as sodium ions, from diffusing into the active layer, thereby preventing these impurities from adversely affecting the performance of the active layer. Furthermore, the buffer layer flattens the glass substrate surface, improving the quality of subsequent film growth and reducing problems such as uneven film thickness caused by uneven substrate surfaces.

[0061] Active layer: Materials can be categorized as amorphous silicon, polycrystalline silicon, and oxide semiconductors. The active layer is a key component in forming the transistor channel. By controlling the transport of carriers within the active layer, pixel switching and drive control are achieved. For example, amorphous silicon active layers offer high uniformity and low cost, making them suitable for large-area display panels. Polycrystalline silicon active layers, on the other hand, offer higher carrier mobility, enabling higher resolution and faster response speeds. Oxide semiconductor active layers, with their excellent transparency and high carrier mobility, have broad application prospects in transparent and high-resolution displays.

[0062] Gate insulation layer: Typically made of insulating materials such as silicon nitride or silicon oxide. It isolates the gate from the active layer. When a voltage is applied to the gate, an electric field is formed in the active layer, thereby controlling the transistor's on and off state. The gate insulation layer also provides good insulation, preventing leakage between the gate and active layer and ensuring the normal operation of the transistor.

[0063] Gate electrode: Metal materials such as aluminum (Al), molybdenum (Mo), and copper (Cu) are generally used. These metals have good conductivity and low resistance, enabling efficient transmission of electrical signals. The gate electrode's function is to apply a gate voltage. By controlling the magnitude and polarity of the gate voltage, it controls the formation and conduction of the channel in the active layer, thereby controlling the switching state of the transistor.

[0064] Source and drain electrodes: These are typically made of the same or similar metal as the gate electrode. They form ohmic contact with the active layer, allowing carriers to be smoothly injected from the source into the active layer and transferred through the channel to the drain, thereby enabling current conduction. The performance of the source and drain electrodes directly affects the transistor's on-resistance and current transfer efficiency, so they must ensure good contact with the active layer.

[0065] Interlayer insulation layer: This can be made of either organic insulating materials, such as polyimide, or inorganic insulating materials, such as silicon nitride or silicon oxide. The primary function of the interlayer insulation layer is to isolate different electrodes and signal lines, preventing short circuits and leakage between them. It also acts as a stress buffer, reducing stress caused by differences in thermal expansion coefficients between different film layers and improving the stability and reliability of the array substrate.

[0066] Passivation layer: Typically made of silicon nitride, silicon oxide, or organic materials. The passivation layer protects the device from external environmental influences such as moisture, oxygen, and dust. Moisture and oxygen can chemically react with the metal electrodes or active layers within the device, causing performance degradation or even failure. The passivation layer effectively blocks these harmful substances from contacting the device, improving its stability and service life.

[0067] Reference Figure 3 As shown, in one embodiment, the display function layer 2 includes a plurality of light-emitting devices 22 and a pixel definition layer 21, the pixel definition layer 21 defines a plurality of pixel openings, and the light-emitting devices 22 are at least partially located within the corresponding pixel openings; wherein the pixel openings define the light-emitting range of the light-emitting devices 22 and determine the positions of light-emitting devices 22 of different colors.

[0068] Preferably, the light-emitting device 22 includes a first electrode 221, a light-emitting functional layer 222, and a second electrode 223, which are sequentially stacked in a direction away from the substrate 1. The second electrodes 223 of the plurality of light-emitting devices 22 are interconnected and continuously arranged. By applying a voltage across the first electrode 221 and the second electrode 223, the light-emitting functional layer 222 emits light. Preferably, the first electrode 221 comprises an anode, and the second electrode 223 comprises a cathode.

[0069] The anode effectively directs externally supplied current into the light-emitting device 22. The light-emitting functional layer 222 is the core of the light-emitting device 22. This layer comprises organic or inorganic materials that generate light radiation under the action of an electric field. Different material combinations and structural designs can achieve different colors and brightnesses of light. The cathode receives electrons from the external circuit and injects them into the light-emitting device 22. Cathode materials generally have a low work function to facilitate electron injection.

[0070] The pixel definition layer 21's primary function is to isolate adjacent pixels from one another, preventing light crosstalk and electrical interference between pixels. By forming a physical barrier between pixels, each pixel can independently emit light and display, thereby improving image clarity and contrast.

[0071] The pixel definition layer 21 precisely defines the shape and size of each pixel, ensuring uniformity and consistency across the entire display. This is crucial for achieving high-quality image display, especially in high-resolution displays, ensuring that each pixel accurately displays the desired color and brightness.

[0072] In some processes, the pixel definition layer 21 can also serve as a mask or template for forming pixel electrodes. Subsequent metal deposition or photolithography processes on the pixel definition layer can accurately form pixel electrodes that precisely match the definition of the pixels, thereby achieving precise control of pixel luminescence.

[0073] Optionally, the light-emitting functional layer 222 includes the following film layers:

[0074] The light-emitting layer (EML) is composed of organic small molecules or polymer materials with a conjugated structure and is the core component that generates light. When electrons and holes recombine in the EML to form excitons, the excitons release energy in the form of light through radiative transitions, thereby generating light. Depending on the display requirements, EML materials can emit different colors of light, such as red, green, and blue, including red emitting host materials, red emitting dopant materials, green emitting host materials, green emitting dopant materials, blue emitting host materials, and blue emitting dopant materials.

[0075] Hole blocking layer (HBL): Located between the light-emitting layer and the electron transport layer, its function is to prevent holes from diffusing from the light-emitting layer to the electron transport layer, so that holes can more effectively recombine with electrons in the light-emitting layer, thereby improving the luminous efficiency. At the same time, it prevents excessive leakage of electrons in the electron transport layer to the hole transport layer, thereby ensuring the stability of the device.

[0076] Electron blocking layer (EBL): Generally located between the light-emitting layer and the hole transport layer. Its main function is to block the migration of electrons from the light-emitting layer to the hole transport layer, so that electrons can fully recombine with holes in the light-emitting layer to emit light, reducing the loss of electrons in other layers, thereby improving the luminescence efficiency and device performance.

[0077] Optionally, the light-emitting functional layer 222 may further include the following film layers:

[0078] Hole injection layer (HIL): Located between the anode and the hole transport layer, its main function is to modify the anode, reduce the energy level barrier between the anode and the hole transport layer, so that the holes from the anode can be more smoothly injected into the hole transport layer, thereby improving the hole injection efficiency and enhancing the luminescence performance of the device.

[0079] Electron injection layer (EIL): Located between the cathode and the electron transport layer, its function is to modify the cathode to help electrons be injected from the cathode to the electron transport layer more efficiently. It also helps to block the transmission of holes toward the cathode, thereby improving the electron injection efficiency and device stability.

[0080] Electron Transport Layer (ETL): Responsible for transferring electrons from the cathode to the light-emitting layer. The ETL material must have an appropriate lowest unoccupied molecular orbital energy level to minimize the injection barrier and lower the initial operating voltage. It must also possess good hole-blocking properties to ensure efficient electron transfer to the light-emitting layer and prevent holes from leaking to the cathode.

[0081] In one embodiment, the transition zone 120 is an annular transition zone, which is arranged around the hole area 130, and the display area 110 is arranged around the annular transition zone, so as to filter the ambient light entering the camera 200 from all sides, and further optimize the imaging effect of the display device.

[0082] Reference Figure 4 and 5 As shown, in one embodiment, the display module further includes an annular isolation region 140, which is disposed around the annular transition region and located between the annular transition region and the display region 110. The pixel definition layer 21 is provided with an annular isolation groove 211, which is located in the annular isolation region 140 and disposed around the annular transition region to isolate moisture and dust, thereby improving the packaging effect and preventing moisture and dust from entering the display region 110 through the hole region 130 and affecting normal display. The width of the annular isolation region 140 is d3.

[0083] In one embodiment, the pixel definition layer 21 is partially located in the transition region 120. Here, the pixel definition layer 21 in the transition region 120 acts as a cushion, and at the same time, the pixel definition layer 21 has little effect on the ambient light entering the camera 200.

[0084] In one embodiment, the display module further includes a light shielding layer 3, which is disposed between the filter layer 4 and the substrate 1 and is at least partially located in the display area 110. The light shielding layer 3 includes a plurality of light-transmitting openings 31. The filter layer 4 includes a plurality of filter units 41, the orthographic projections of the filter units 41 on the substrate 1 being at least partially located within the orthographic projections of the corresponding light-transmitting openings 31 on the substrate 1. The light shielding layer 3 is used to prevent crosstalk between light-emitting devices of different colors. The light-transmitting openings 31 are used to transmit light emitted by the corresponding light-emitting device, and the filter units 41 are used to adjust the brightness decay rate of the light emitted by the corresponding light-emitting device 22.

[0085] Preferably, the orthographic projection of the pixel opening on the target plane overlaps with the orthographic projection of the light-transmitting opening 31 on the target plane, so as to better transmit the light emitted by the light-emitting device 22 .

[0086] Preferably, the orthographic projection of the light-shielding layer 3 on the target plane overlaps with the orthographic projection of the pixel definition layer 21 on the target plane, so as to achieve better light shielding and prevent crosstalk between lights of different colors.

[0087] Optionally, the filter portion 42 is partially on the same layer as the light shielding layer to ensure that the filter portion 42 has sufficient height, which is beneficial to extend the light path and thus improve the filtering effect.

[0088] In one embodiment, the light-emitting device 22 includes a red light-emitting device, a green light-emitting device, and a blue light-emitting device; the filter unit 41 includes a red filter, a blue filter, and a green filter. The orthographic projection of the red light-emitting device on the substrate 1 is located within the orthographic projection of the corresponding red filter on the substrate 1, the orthographic projection of the green light-emitting device on the substrate 1 is located within the orthographic projection of the corresponding green filter on the substrate 1, and the orthographic projection of the blue light-emitting device on the substrate 1 is located within the orthographic projection of the corresponding blue filter on the substrate 1. The brightness decay rate of the light output of the light-emitting devices 22 of different colors can be adjusted by adjusting the thickness of the red filter, the blue filter, and the green filter, so that the brightness decay rate of the light-emitting devices 22 of the three colors tends to be consistent, thereby improving the color cast phenomenon of the display module.

[0089] Reference Figure 6 As shown, in one embodiment, the display module further includes an encapsulation layer 5. The encapsulation layer 5 is partially disposed between the display function layer 2 and the light shielding layer 3, and partially disposed between the display function layer 2 and the filter layer 4. The encapsulation layer 5 is partially located within the annular isolation groove 211. The encapsulation layer 9 is used to protect the display function layer 2. Furthermore, the encapsulation layer 5 is partially located within the annular isolation groove 211, which helps to improve the isolation effect against moisture and dust.

[0090] Preferably, the orthographic projection of the filter portion 42 on the target plane does not overlap with the orthographic projection of the encapsulation layer 5 on the target plane, which is beneficial to improving the filtering effect and preventing the encapsulation layer 5 from blocking the light entering the camera 200.

[0091] Preferably, the filter portion 42 contacts the pixel definition layer 21 near the surface of the pixel definition layer 21 , and contacts the encapsulation layer 5 away from the side wall of the hole area 130 , further increasing the height of the filter portion 42 , thereby further extending the light path and improving the filtering effect.

[0092] In one embodiment, the encapsulation layer 5 includes a first encapsulation layer, a second encapsulation layer, and a third encapsulation layer stacked sequentially away from the substrate 1. The first and third encapsulation layers are inorganic layers, while the second encapsulation layer is an organic layer. The inorganic layer is highly dense to isolate water and oxygen, while the organic layer is thick enough to flatten the surface of the display module, achieving an inorganic-organic-inorganic triple-layer encapsulation.

[0093] Specifically, the synergistic effect of the inorganic and organic layers effectively blocks harmful substances such as water vapor and oxygen, extending the device's lifespan. Research has shown that this three-layer packaging structure can reduce water vapor permeability to very low levels, meeting the requirements for long-term stable device operation.

[0094] Optionally, the first encapsulation layer is typically formed using techniques such as chemical vapor deposition (CVD) and atomic layer deposition (ALD). Materials such as silicon nitride and silicon oxide have excellent barrier properties, effectively blocking water vapor and oxygen from entering the display module and reacting with the organic light-emitting material and electrodes, thereby improving device stability and service life.

[0095] Optionally, the second encapsulation layer is prepared by processes such as inkjet printing and spin coating. The material is an organic polymer such as polymethyl methacrylate or polyvinylidene chloride. The organic layer buffers the stress between the inorganic layers, reducing film cracking or peeling caused by factors such as differences in thermal expansion coefficients. It also provides barrier properties, further blocking moisture and oxygen.

[0096] The third encapsulation layer, similar to the first, is deposited using methods such as CVD and ALD, and is also typically made of materials such as silicon nitride and silicon oxide. Its primary function is to provide a strong barrier against moisture and oxygen, forming a double layer of protection alongside the first inorganic layer, shielding the display module from environmental influences.

[0097] The three-layer structure works together. The inorganic layer provides excellent water vapor and oxygen barrier capabilities, while the organic layer buffers stress while also playing a certain barrier role, which can effectively extend the life of the display module.

[0098] Reference Figure 7 As shown, in one embodiment, the display module further includes a planarization layer 6, which is partially disposed between the encapsulation layer 5 and the filter layer 4, and partially disposed between the encapsulation layer 5 and the light shielding layer 3. The planarization layer 6 plays a planarizing role, and is used to flatten the surface of the display module to facilitate the preparation of other film layers.

[0099] Furthermore, the planarization layer 6 has the following functions:

[0100] Optimizing surface flatness: The surface of the encapsulation layer 5 may have irregularities, such as tiny bumps, depressions, or uneven thickness. The planarization layer 6 fills these irregularities, providing a smooth base for the filter layer 4 and ensuring a uniform thickness, thereby improving the uniformity and accuracy of displayed colors. For example, if the filter layer 4 is deposited on an uneven surface, the filtering effect may be inconsistent in some areas, resulting in color deviation.

[0101] Improve optical performance: By rationally designing the optical parameters of the planarization layer, such as refractive index and thickness, the scattering and reflection of light during transmission between the encapsulation layer 5 and the filter layer 4 can be reduced, thereby improving the light transmittance and output efficiency, optimizing the overall optical performance of the display module, and making the displayed image clearer and brighter.

[0102] Protecting the filter layer 4 and the encapsulation layer 5: On the one hand, the planarization layer 6 can serve as a buffer layer to reduce the impact and friction of external factors on the filter layer 4, prevent the filter layer 4 from being damaged, and also prevent the filter layer 4 from damaging the encapsulation layer 5 during the preparation or use process; on the other hand, it can also play a certain protective role for the filter layer 4, preventing it from being corroded by water vapor, oxygen, etc., thereby extending the service life of the filter layer 4 and the entire display module.

[0103] Improved process compatibility: Providing more favorable process conditions for the preparation of the filter layer 4. A flat surface helps to obtain more precise and uniform patterns and film layers in processes such as photolithography and coating, improving process repeatability and product consistency, reducing production costs and improving production efficiency.

[0104] Enhanced electrical insulation: This layer isolates the filter layer 4 from the encapsulation layer 5 and any other conductive layers, preventing electrical short circuits and improving the electrical performance and stability of the display module. In display modules with complex circuit structures, good insulation is crucial to ensure the proper functioning of each functional layer.

[0105] Optionally, the material of the planarization layer 6 may be photosensitive polyimide (PSPI), acrylic polymer (such as PMMA), epoxy resin material, etc.

[0106] Preferably, the planarization layer 6 is partially located in the transition region 120 . Here, the planarization layer 6 in the transition region 120 plays the role of padding and flattening. At the same time, the planarization layer 6 has little effect on the ambient light entering the camera 200 .

[0107] Preferably, the portion of the planarization layer 6 located in the transition region 120 contacts the pixel definition layer 21 , reducing the number of film layer gaps in the hole region 130 , thereby improving the packaging effect, reducing the risk of packaging failure, and ensuring the planarization effect.

[0108] In one embodiment, the substrate 1 includes a substrate and multiple metal layers stacked on the substrate, and the orthographic projection of the metal layer on the substrate does not overlap with the transition area 120, thereby avoiding the metal layer in the transition area 120 reflecting ambient light and affecting the normal entry of ambient light into the camera 200.

[0109] Different metal layers can have different properties. For example, the first metal layer M1 can be made of a highly conductive metal, such as copper, for primary data signal transmission to reduce resistance and minimize losses during signal transmission. The second metal layer M2 can be made of a metal such as molybdenum or titanium, which has better corrosion resistance and stability, and is used for auxiliary data lines or connections with other circuit components. This fully leverages the advantages of different metal materials and improves the performance and reliability of the entire data line circuit. Furthermore, the data line structure formed by the two metal layers can enhance the circuit's resistance to electromagnetic interference, reducing the impact of external electromagnetic fields on data signals, while also reducing the electromagnetic radiation interference of the data line on other circuits.

[0110] The third metal layer M3 is used to form the source / drain, bridge line and metal power line of the transistor, and the fourth metal layer M4 is used to form the metal power line. The metal power lines in the third metal layer M3 are connected into a mesh through vias.

[0111] The fourth metal layer M4 connects the metal power lines in the third metal layer M3 into a mesh through vias, which has the following functions:

[0112] Reducing power line impedance: When metal power lines form a mesh structure, the current transmission paths increase, which is equivalent to connecting multiple power lines in parallel. Based on the principle of parallel resistance, the total impedance is significantly reduced. This helps reduce the power consumption of the power signal during transmission, thereby reducing the overall power consumption of the display panel.

[0113] More uniform voltage distribution: Reducing the impedance of the power line can reduce the difference in power signal voltage across the display area. In OLED display modules, each pixel unit can receive a more stable and uniform power supply, thereby making the display panel more uniform in brightness and improving the display quality of the display panel.

[0114] Improved wiring flexibility: In display panel design, different circuit modules and pixel units have different requirements for the connection method and location of power lines. The mesh connection of the power lines on the fourth and third metal layers (M3) allows flexible connection of power lines in different areas as needed, better meeting the requirements of complex circuit layouts and improving wiring flexibility and design freedom.

[0115] Enhanced circuit reliability: When a power line is broken or experiences other faults, the mesh structure provides multiple current transmission paths, allowing current to continue to be transmitted through other paths, thereby improving the reliability and stability of the entire power circuit and reducing the risk of display module failure due to a single line fault.

[0116] Furthermore, an insulating layer is provided between adjacent metal layers. This layer prevents short circuits caused by direct contact between different metal layers, ensuring that the electrical properties of each metal layer are not disturbed and maintaining normal circuit function. It also reduces signal interference between adjacent metal layers and improves display quality.

[0117] For example, a first insulating layer is provided between the first metal layer M1 and the second metal layer M2, which has the following functions:

[0118] Electrical isolation: The insulating layer prevents direct current conduction between the first metal layer M1 and the second metal layer M2, ensuring that current flows along the designed path within each metal layer and the circuits connected to it. This prevents short circuits between the two metal layers and ensures the proper functioning of different circuits. For example, it prevents erroneous current paths between the data line (formed by the first metal layer M1 and the second metal layer M2) and the circuits connected to other metal layers, thereby improving the stability and reliability of the display panel.

[0119] Preventing signal interference: The insulating layer reduces the electromagnetic coupling effect between the two metal layers. When current flows through the metal layers, it generates an electromagnetic field. Without the isolation of the insulating layer, the electromagnetic fields between the first metal layer M1 and the second metal layer M2 may interfere with each other, causing signal distortion or crosstalk. The presence of the insulating layer effectively reduces this electromagnetic interference, ensuring the accurate transmission of data signals and other control signals, and improving the display quality of the display panel.

[0120] Support and protection: The insulating layer provides mechanical support for the upper and lower metal layers, making them more structurally stable. It also protects the metal layers from environmental factors, such as moisture and oxygen, which can cause oxidation. This extends the life of the metal layers and improves the reliability and stability of the entire display panel.

[0121] Planarization: During the display panel manufacturing process, the deposition of various material layers may result in surface unevenness. The insulating layer fills the tiny bumps and grooves on the metal layer, providing a smooth surface for subsequent metal deposition. This helps improve the uniformity and density of the metal layer, further enhancing the performance of the display panel.

[0122] Typically, the insulating layer material used between the first metal layer M1 and the second metal layer M2 needs to have good insulation properties, high dielectric strength, good thermal stability, and chemical stability. Common materials include silicon nitride and silicon oxide. These materials can form a uniform, dense insulating film between the metal layers through processes such as chemical vapor deposition and physical vapor deposition.

[0123] Optionally, the substrate is a flexible substrate, preferably PI (polyimide), which has the following characteristics:

[0124] Excellent mechanical properties: It has high tensile strength and good flexibility, and can withstand multiple bending and folding without breaking or performance degradation. This allows the display module to achieve functions such as flexible bending and folding, meeting the needs of new display products such as wearable devices and foldable mobile phones.

[0125] High heat resistance: PI has excellent thermal stability and can maintain stable physical and chemical properties in high-temperature environments. Its glass transition temperature is usually above 200°C, and it can withstand high-temperature processes in the manufacturing process, such as thin film deposition and photolithography. At the same time, it can also resist the impact of ambient temperature changes on display performance during long-term use.

[0126] Good chemical stability: It has strong tolerance to common chemical reagents, is not easily corroded by chemicals such as acids and alkalis, and can maintain the integrity and performance stability of the material in complex manufacturing processes and use environments.

[0127] Low dielectric constant: It has a lower dielectric constant, which can reduce the capacitive coupling effect during signal transmission, reduce signal delay and energy consumption, and help improve the display performance and response speed of the display module.

[0128] Optionally, the filter unit 42 includes one or more of a red light filter, a blue light filter, and a green light filter, so as to optimize different imaging effects.

[0129] For example, when the picture taken by the camera 200 is greenish, the filter section 42 in the transition zone 120 is used to filter out part of the green light, and a red light filter and / or a blue light filter can be selected at this time; when the picture taken by the camera 200 is bluish, the filter section 42 in the transition zone 120 is used to filter out part of the blue light, and a red light filter and / or a green light filter can be selected at this time; when the picture taken by the camera 200 is reddish, the filter section 42 in the transition zone 120 is used to filter out part of the red light, and a blue light filter and / or a green light filter can be selected at this time to optimize the imaging effect of the display device.

[0130] While the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0131] It should be noted that the above description is limited to some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in an order different from that described in the above embodiments and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the specific order or sequential order shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0132] The embodiments of the present application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of this application.

Claims

1. A display device, characterized in that: The display module comprises a display area, a transition area and a hole area, wherein the transition area is arranged between the display area and the hole area. The display module further comprises: substrate; A display function layer is disposed on one side of the substrate and is at least partially located in the display area; a filter layer, disposed on a side of the display function layer away from the substrate, the filter layer comprising a filter portion, and the filter portion is located in the transition region; The camera is arranged on a side of the substrate away from the display function layer, the orthographic projection of the hole area on the target plane is located within the orthographic projection of the camera on the target plane, the orthographic projection of the transition area on the target plane is located within the orthographic projection of the camera on the target plane, and the target plane is the plane where the surface of the substrate close to the display function layer is located.

2. The display device according to claim 1, wherein The display function layer includes a plurality of light-emitting devices and a pixel definition layer, wherein the pixel definition layer defines a plurality of pixel openings, and the light-emitting devices are at least partially located in the corresponding pixel openings; Preferably, the light-emitting device comprises a first electrode, a light-emitting functional layer, and a second electrode sequentially stacked in a direction away from the substrate, and the second electrodes of the plurality of light-emitting devices are interconnected and continuously arranged; Preferably, the first electrode comprises an anode, and the second electrode comprises a cathode.

3. The display device according to claim 2, wherein: The transition area is an annular transition area, the annular transition area is arranged around the hole area, and the display area is arranged around the annular transition area; Preferably, the display module also includes an annular isolation area, which is arranged around the annular transition area and located between the annular transition area and the display area. The pixel definition layer is provided with an annular isolation groove, which is located in the annular isolation area and arranged around the annular transition area.

4. The display device according to claim 2, wherein: The pixel definition layer is partially located in the transition area.

5. The display device according to claim 3, wherein The display module further includes: a light shielding layer disposed between the filter layer and the substrate and at least partially located in the display area, the light shielding layer comprising a plurality of light-transmitting openings; the filter layer comprising a plurality of light-filtering units, the orthographic projections of the light-filtering units on the substrate being at least partially located within the orthographic projections of the corresponding light-transmitting openings on the substrate; Preferably, the orthographic projection of the pixel opening on the target plane overlaps with the orthographic projection of the light-transmitting opening on the target plane; Preferably, the orthographic projection of the light-shielding layer on the target plane overlaps with the orthographic projection of the pixel definition layer on the target plane.

6. The display device according to claim 5, wherein: The light-emitting devices include a red light-emitting device, a green light-emitting device and a blue light-emitting device; the filtering unit includes a red light filter, a blue light filter and a green light filter, the orthographic projection of the red light-emitting device on the substrate is located within the orthographic projection of the corresponding red light filter on the substrate, the orthographic projection of the green light-emitting device on the substrate is located within the orthographic projection of the corresponding green light filter on the substrate, and the orthographic projection of the blue light-emitting device on the substrate is located within the orthographic projection of the corresponding blue light filter on the substrate.

7. The display device according to claim 5, wherein: The display module further includes: an encapsulation layer, wherein the encapsulation layer is partially disposed between the display function layer and the light shielding layer, and partially disposed between the display function layer and the filter layer, and the encapsulation layer is partially located in the annular isolation groove; Preferably, the orthographic projection of the filter portion on the target plane does not overlap with the orthographic projection of the encapsulation layer on the target plane; Preferably, the filter portion is close to the surface of the pixel definition layer and contacts the pixel definition layer, and the filter portion is away from the sidewall of the hole area and contacts the encapsulation layer; Preferably, the encapsulation layer comprises a first encapsulation layer, a second encapsulation layer and a third encapsulation layer stacked in sequence in a direction away from the substrate, the first encapsulation layer and the third encapsulation layer are inorganic layers, and the second encapsulation layer is an organic layer.

8. The display device according to claim 7, wherein: The display module further includes a planarization layer, wherein the planarization layer is partially disposed between the encapsulation layer and the filter layer, and partially disposed between the encapsulation layer and the light shielding layer; Preferably, the planarization layer is partially located in the annular transition zone; Preferably, a portion of the planarization layer located in the annular transition region contacts the pixel definition layer.

9. The display device according to claim 1, wherein The base plate includes a substrate and a plurality of metal layers stacked on the substrate, wherein the orthographic projections of the metal layers on the substrate do not overlap with the transition region.

10. The display device according to claim 1, wherein The filter portion includes one or more of a red light filter, a blue light filter, and a green light filter.

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