Display device and preparation method thereof

Abstract

The invention discloses a display device, a display device preparation method and a display device. The display device comprises a substrate; the light-emitting functional layer is arranged on one side of the substrate, and the light-emitting functional layer comprises a light-emitting unit; the light shielding layer is arranged on the side, away from the substrate, of the light emitting functional layer, the light shielding layer comprises a plurality of light shielding parts arranged at intervals, and orthographic projections of the light shielding parts on the substrate and orthographic projections of the light emitting units on the substrate are not overlapped; the first adhesive layer is arranged on one side, deviating from the substrate, of the shading layer; and the light filtering layer is fixed on one side, deviating from the substrate, of the first adhesive layer. The filter layer can be arranged in a whole layer mode, patterning processing does not need to be carried out on the light-emitting units with different light-emitting colors, color resistors corresponding to the light-emitting units with different light-emitting colors do not need to be formed through a mask plate, and the production cost is reduced. The light filtering layer can be independently fixed through the first adhesive layer, so that the light filtering layer can be independently prepared, and the material of the light filtering layer has more selectivity.

Description

Technical Field

[0001] This invention belongs to the field of electronic product technology, and in particular relates to a display device and a method for manufacturing the display device. Background Technology

[0002] With the advancement of technology, digital display devices such as smartphones and tablets have been widely used, and the display screen is an indispensable human-to-human communication interface in these devices. OLED (Organic Light Emitting Diode) display devices, for example, have advantages such as self-illumination, energy saving, flexibility, and good adaptability. Furthermore, these display devices do not require a backlight and feature fast response times and excellent display effects, attracting user attention and being widely used in smartphones, tablets, and other terminal products.

[0003] However, due to the structural limitations of existing display devices, their performance cannot meet the requirements.

[0004] Therefore, there is an urgent need for a new display device and a method for manufacturing the display device. Summary of the Invention

[0005] This invention provides a display device and a method for manufacturing the display device. The filter layer is separately fixed by a first adhesive layer, thus allowing the filter layer to be prepared independently. For example, the filter layer can be prepared using a separate high-temperature process, and then bonded and fixed using the first adhesive layer. The filter layer prepared using a high-temperature process offers greater material selection, improving the performance of the display device.

[0006] In a first aspect, embodiments of the present invention provide a display device, comprising: a substrate; a light-emitting functional layer disposed on one side of the substrate, the light-emitting functional layer including light-emitting units; a light-shielding layer disposed on the side of the light-emitting functional layer opposite to the substrate, the light-shielding layer including a plurality of spaced-apart light-shielding portions, the orthographic projection of the light-shielding portions on the substrate and the orthographic projection of the light-emitting units on the substrate not overlapping; a first adhesive layer disposed on the side of the light-shielding layer opposite to the substrate; and a light-filtering layer fixed to the side of the first adhesive layer opposite to the substrate.

[0007] In a second aspect, embodiments of the present invention provide a method for manufacturing a display device, for manufacturing the display device of the first aspect described above, comprising the following steps: providing a substrate; forming a light-emitting functional layer on one side of the substrate, the light-emitting functional layer including light-emitting units; forming a light-shielding layer on the side of the light-emitting functional layer away from the substrate, the light-shielding layer including a plurality of spaced-apart light-shielding portions, the orthographic projection of the light-shielding portions on the substrate and the orthographic projection of the light-emitting units on the substrate not overlapping; forming a first adhesive layer on the side of the light-shielding layer away from the substrate; forming a filter layer and fixing the filter layer to the side of the first adhesive layer away from the substrate.

[0008] Compared with related technologies, the display device provided in this embodiment of the invention includes a substrate, a light-emitting functional layer, a light-shielding layer, a first adhesive layer, and a light-filtering layer. On one hand, in this embodiment, the light-filtering layer can be integrally formed, eliminating the need for patterning of light-emitting units with different emission colors. Compared to existing technologies, it eliminates the need to form color resists corresponding to different emission colors using a mask, thus reducing production costs. On the other hand, since the light-filtering layer is separately fixed by the first adhesive layer, it can be fabricated independently. For example, the light-filtering layer can be fabricated using a separate high-temperature process, and then bonded and fixed using the first adhesive layer. The material of the light-filtering layer fabricated using the high-temperature process offers greater material flexibility. Attached Figure Description

[0009] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the structure of a display device according to an embodiment of the present invention; Figure 2 This is provided by one embodiment of the present invention. Figure 1 A partial schematic diagram at point A in the middle; Figure 3 This is provided by one embodiment of the present invention. Figure 2 Schematic diagram of the cross section at point BB; Figure 4 This is provided by another embodiment of the present invention. Figure 2 Schematic diagram of the cross section at point BB; Figure 5 This is provided by yet another embodiment of the present invention. Figure 2 Schematic diagram of the cross section at point BB; Figure 6 This is provided by yet another embodiment of the present invention. Figure 2Schematic diagram of the cross section at point BB; Figure 7 This is provided by yet another embodiment of the present invention. Figure 2 Schematic diagram of the cross section at point BB; Figure 8 This is provided by yet another embodiment of the present invention. Figure 2 Schematic diagram of the cross section at point BB; Figure 9 This is provided by yet another embodiment of the present invention. Figure 2 Schematic diagram of the cross section at point BB; Figure 10 This is provided by yet another embodiment of the present invention. Figure 2 Schematic diagram of the cross section at point BB; Figure 11 This is provided by yet another embodiment of the present invention. Figure 2 Schematic diagram of the cross section at point BB; Figure 12 This is provided by yet another embodiment of the present invention. Figure 2 Schematic diagram of the cross section at point BB; Figure 13 This is provided by yet another embodiment of the present invention. Figure 2 Schematic diagram of the cross section at point BB; Figure 14 This is provided by yet another embodiment of the present invention. Figure 2 Schematic diagram of the cross section at point BB; Figure 15 This is a flowchart of a method for manufacturing a display device according to an embodiment of the present invention; Figure 16 This is a schematic diagram of the structure obtained during the fabrication process of a display device fabrication method according to an embodiment of the present invention; Figure 17 This is a schematic diagram of the structure obtained during the fabrication process of the display device fabrication method provided in another embodiment of the present invention; Figure 18 This is a schematic diagram of the structure obtained during the fabrication process of a display device fabrication method according to another embodiment of the present invention.

[0011] In the attached image: 10-Display panel; 100-Substrate; 20-Light-emitting functional layer; 200-Light-emitting unit; 210-Red light-emitting unit; 220-Green light-emitting unit; 230-Blue light-emitting unit; 30-Light-shielding layer; 300-Light-shielding part; 310-First light-shielding part; 320-Second light-shielding part; 330-Third light-shielding part; 400-First adhesive layer; 500-Filter layer; 600-Pixel definition layer; 700-First electrode layer; 800-Second electrode layer; 900-Encapsulation layer; 910-First inorganic layer; 920-First organic layer; 930-Second inorganic layer; L - Scattering particles; S - Source; D - Drain; G - Gate; J - Active layer; T - Pixel circuit; P - Cover plate; N - Second adhesive layer; B - Transparent protective layer; F - Anti-permeation layer; C1 - First side surface; C2 - Second side surface; C3 - Third side surface; Z - Anti-reflection layer; α1 - Angle between the extension surface of the first side surface and the substrate; α2 - Angle between the extension surface of the second side surface and the substrate; α3 - Angle between the extension surface of the third side surface and the substrate. Detailed Implementation

[0012] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention.

[0013] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0014] In the prior art, color resists can be set on the light-emitting functional layer 20 of the display device for light-emitting units 200 of different colors to achieve light filtering. However, each color resist needs to be prepared separately through a mask, which involves many processes and high costs.

[0015] To solve the above problems, the display device provided in this embodiment of the invention replaces the color resist with a filter layer 500, eliminating the need for patterning processing of the light-emitting units 200 with different light-emitting colors. Compared with the prior art, it eliminates the need to form color resists for light-emitting units 200 with different light-emitting colors through a mask, thereby reducing production costs.

[0016] To better understand this invention, the following is combined with... Figures 1 to 17 The display device and its manufacturing method according to embodiments of the present invention will be described in detail.

[0017] Please see Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of a display device according to an embodiment of the present invention; Figure 2 This is provided by one embodiment of the present invention. Figure 1 A partial schematic diagram at point A in the middle; Figure 3 This is provided by an embodiment of the present invention. Figure 2 A cross-sectional view of section BB.

[0018] This invention provides a display device, comprising: a substrate 100; a light-emitting functional layer 20 disposed on one side of the substrate 100, the light-emitting functional layer 20 including light-emitting units 200; a light-shielding layer 30 disposed on the side of the light-emitting functional layer 20 away from the substrate 100, the light-shielding layer 30 including a plurality of spaced-apart light-shielding portions 300, the orthographic projection of the light-shielding portions 300 on the substrate 100 and the orthographic projection of the light-emitting units 200 on the substrate 100 not overlapping; a first adhesive layer 400 disposed on the side of the light-shielding layer 30 away from the substrate 100; and a light-filtering layer 500 fixed to the side of the first adhesive layer 400 away from the substrate 100.

[0019] The display device provided in this embodiment of the invention includes a substrate 100, a light-emitting functional layer 20, a light-shielding layer 30, a first adhesive layer 400, and a light-filtering layer 500. On one hand, in this embodiment, the light-filtering layer 500 can be integrally formed without patterning the light-emitting units 200 with different light-emitting colors. Compared to existing technologies, it eliminates the need to form color resists corresponding to different light-emitting units 200 using a mask, reducing production costs. On the other hand, since the light-filtering layer 500 is separately fixed by the first adhesive layer 400, it can be fabricated independently. For example, the light-filtering layer 500 can be fabricated using a separate high-temperature process, and then bonded and fixed using the first adhesive layer 400. The material of the light-filtering layer 500 fabricated using the high-temperature process offers greater material selectivity. By systematically optimizing the transmittance, absorptivity, and reflectivity of the light-filtering layer 500 spectrum—that is, by absorbing the light emitted by the light-emitting units 200 with different light-emitting colors through the spectrum—it achieves the goal of reducing reflectivity while simultaneously improving light extraction efficiency, thus improving the performance of the display device.

[0020] Through the inventor's research and experiments, it was found that there are few materials available for the low-temperature fabrication of the filter layer 500, and the difference between the spectrum and the color resistance is large. This causes ambient light to be able to penetrate the filter layer 500, be reflected by the first electrode layer 700, and then be emitted through the filter layer 500, resulting in high reflectivity and poor ambient contrast, which affects the performance of the display panel 10.

[0021] Therefore, the filter layer 500 in this application can be fabricated using a separate high-temperature process. The filter layer 500 formed by high-temperature fabrication can, on the one hand, match the spectrum of existing OLED devices, improving light extraction efficiency; on the other hand, it reduces the screen's reflectivity by absorbing ambient light. The materials available for the high-temperature fabricated filter layer 500 are also more abundant.

[0022] Optionally, the substrate 100 may include a substrate and an array layer, the array layer including a driving circuit. For example, the array layer may include a first conductive layer, a second conductive layer, and a third conductive layer disposed on one side of the substrate and stacked thereon. An insulating layer is disposed between adjacent conductive film layers. Exemplarily, the pixel driving circuit disposed on the array layer includes a transistor and a storage capacitor. The transistor includes an active layer J, a gate G, a source S, and a drain D. The storage capacitor includes a first electrode and a second electrode. As an example, the gate G and the first electrode may be located on the first conductive layer, the second electrode may be located on the second conductive layer, and the source S and drain D may be located on the third conductive layer.

[0023] Optionally, the light-emitting functional layer 20 may include one or more of the following: an electron injection layer, an electron transport layer, a light-emitting material layer, a hole blocking layer, an electron blocking layer, a hole transport layer, and a hole injection layer. The specific type of light-emitting layer can be selected based on its specific characteristics, and there are no particular limitations.

[0024] Optionally, the display device further includes a first electrode layer 700 disposed on the side of the light-emitting functional layer 20 facing the substrate 100 and a second electrode layer 800 disposed on the side of the light-emitting functional layer 20 away from the substrate 100. An electron injection layer, an electron transport layer, and a hole blocking layer may be disposed between the second electrode layer 800 and the light-emitting material layer. The electron blocking layer, the hole transport layer, and the hole injection layer may be disposed between the first electrode layer 700 and the light-emitting material layer.

[0025] The material of the first electrode layer 700 is generally a material with a high work function to improve hole injection efficiency. It can be gold (Au), platinum (Pt), titanium (Ti), silver (Ag), indium tin oxide (ITO), zinc tin oxide (IZO), or a transparent conductive polymer (such as polyaniline). For example, the first electrode layer 700 can be made of ITO-Ag-ITO composite material, without any special limitations.

[0026] The material of the second electrode layer 800 can be one of the following metals: silver (Ag), aluminum (Al), lithium (Li), magnesium (Mg), ytterbium (Yb), calcium (Ca), or indium (In). It can also be an alloy of the aforementioned metals, such as magnesium-silver alloy (Mg / Ag) or lithium-aluminum alloy (Li / Al). This embodiment does not impose any restrictions on this.

[0027] Optionally, the display device further includes a pixel definition layer 600 disposed on one side of the substrate 100, the pixel definition layer 600 including a pixel opening, and the light-emitting unit 200 being at least partially located within the pixel opening.

[0028] It should be noted that the light-shielding layer 30 may include a black matrix material, is set to be opaque, and the orthographic projection of the light-shielding part 300 on the substrate 100 and the orthographic projection of the light-emitting unit 200 on the substrate 100 do not overlap, that is, the light-shielding part 300 will not block the light-emitting unit 200, ensuring the normal light emission of the light-emitting unit 200. Each light-shielding part 300 can be correspondingly disposed between the light-emitting units 200, that is, the orthographic projection of the light-shielding part 300 on the substrate 100 can be located between the orthographic projections of adjacent light-emitting units 200 on the substrate 100.

[0029] The first adhesive layer 400 can be made of OCR (Optical Clear Resin), which, because it is liquid, is also called liquid optical adhesive, optical water adhesive, or LOCA. Alternatively, the first adhesive layer 400 can also be made of OC (optical adhesive), OCA (Optical Clear Adhesive), etc. OCA adhesive is made by using optical acrylic adhesive as a substrate, and then bonding a release film to the top and bottom layers to obtain a double-sided adhesive tape without a substrate material. OCA adhesive layers have uniform thickness, high flatness, high adhesion, and high bonding strength after bonding. Of course, the first adhesive layer 400 can also be made of other materials, such as pressure-sensitive adhesive, double-sided tape, etc.

[0030] Optionally, the filter layer 500 includes a gray planarization layer, which may be a gray organic film layer with a flat surface, to improve the flatness of the display panel 10.

[0031] Optionally, the material of the filter layer 500 includes at least one of anthrone, imide, perylene imide, naphthalene imide, and rhodamine. The specific material can be adjusted according to factors such as the transmittance, absorption, and reflectance of the filter layer 500 for different colors of light.

[0032] Please see Figure 4 , Figure 4 This is provided by another embodiment of the present invention. Figure 2 A cross-sectional view at point BB; in some optional embodiments, the filter layer 500 includes scattering particles L. By setting scattering ions, the dispersion problem caused by the light-shielding layer 30 can be improved, the visual effect of the display panel 10 can be enhanced, and the dispersion can be reduced. The scattering particles L added to the filter layer 500 can be uniformly covered throughout the entire layer or non-uniformly distributed.

[0033] Please see Figure 5 , Figure 5 This is provided by yet another embodiment of the present invention. Figure 2 A cross-sectional view at point BB; optionally, the light-emitting unit 200 includes a red light-emitting unit 210, a green light-emitting unit 220, and a blue light-emitting unit 230; the orthographic projection of the scattering particle L on the substrate 100 and the orthographic projection of the red light-emitting unit 210 on the substrate 100 at least partially overlap, and / or, the orthographic projection of the scattering particle L on the substrate 100 and the orthographic projection of the green light-emitting unit 220 on the substrate 100 at least partially overlap.

[0034] In this embodiment, scattering ions can be provided in the filter layer 500 above the red light-emitting unit 210 to disperse the light emitted by the red light-emitting unit 210 and reduce the sensitivity of the human eye to color dispersion.

[0035] Alternatively, since the human eye is more sensitive to green light, scattering ions can be separately placed in the filter layer 500 above the green light-emitting unit 220 to disperse the light emitted by the green light-emitting unit 220 and reduce the human eye's sensitivity to color dispersion.

[0036] Of course, scattering ions can also be simultaneously placed in the filter layer 500 above the red light-emitting unit 210 and the green light-emitting unit 220. Depending on actual needs, the orthographic projection of the scattering particles L on the substrate 100 and the orthographic projection of the blue light-emitting unit 230 on the substrate 100 can be limited to at least partially overlapping.

[0037] In some optional embodiments, the scattering particles L in the filter layer 500 are uniformly distributed, that is, the scattering particles L can be uniformly arranged in the entire filter layer 500 to ensure that the light emitted by each light-emitting unit 200 can be scattered by the scattering ions.

[0038] Please see Figure 6 , Figure 6 This is provided by yet another embodiment of the present invention. Figure 2 A cross-sectional view at BB; in some optional embodiments, the display device further includes a transparent protective layer B, a second adhesive layer N, and a cover plate P; the transparent protective layer B is disposed on the side of the filter layer 500 away from the substrate 100, the cover plate P is disposed on the side of the transparent protective layer B away from the substrate 100, and the cover plate P is connected to the transparent protective layer B through the second adhesive layer N.

[0039] In this embodiment, by providing a transparent protective layer B on the side of the filter layer 500 away from the substrate 100, the filter layer 500 can be isolated and protected. The density of the transparent protective layer B can be used to prevent the filter layer 500 from penetrating under high temperature and high humidity conditions, thereby improving the reliability of the display device.

[0040] The cover plate P is a film layer made of materials such as glass with high light transmittance, which serves to protect the display device. Specifically, the cover plate P can be made of rigid materials, which is relatively low in cost; or it can be made of flexible materials, so that the cover plate P can be folded, thus making it applicable to flexible and foldable display modules. Specifically, the cover plate P can be made of transparent, soft, and foldable materials such as UTG (Ultra Thin Glass), CPI (Colorless Polyimide), and PET (Polyethylene Terephthalate), so as to achieve the bendability and foldability of the cover plate P, making it easy to be used in foldable display devices.

[0041] The cover plate P is bonded and fixed to the transparent protective layer B by the second adhesive layer N. The second adhesive layer N can be made of the same material as the first adhesive layer 400 to reduce costs, or it can be made of different materials as needed. For example, the second adhesive layer N can be made of OCA adhesive and the first adhesive layer 400 can be made of OCR adhesive.

[0042] Optionally, depending on actual needs, the filter layer 500 can also be used as the second adhesive layer N, that is, the display device also includes a cover plate P, so that the filter layer 500 can be directly bonded to the cover plate P, thereby reducing the overall film thickness of the display device.

[0043] Please see Figure 7 , Figure 7 This is provided by yet another embodiment of the present invention. Figure 2 A cross-sectional view at BB; In some other optional embodiments, the transparent protective layer B may also be disposed between the filter layer 500 and the first adhesive layer 400, and the cover plate P is disposed on the side of the filter layer 500 away from the substrate 100, and the cover plate P is connected to the filter layer 500 through the second adhesive layer N.

[0044] In this embodiment, the transparent protective layer B is disposed below the filter layer 500, which can also prevent the filter layer 500 from penetrating downwards and reduce the risk of the membrane layer located below the filter layer 500 being penetrated.

[0045] Understandably, since the light-transmitting protective layer is located above the light-emitting functional layer 20, the light emitted by the light-emitting unit 200 needs to pass through the light-transmitting protective layer. Therefore, the transparent protective layer B needs to be made of a light-transmitting material. For example, the material of the transparent protective layer B includes at least one of transparent polyimide and polyethylene terephthalate.

[0046] Please see Figure 8 , Figure 8 This is provided by yet another embodiment of the present invention. Figure 2A cross-sectional view at BB; in some optional embodiments, the display device further includes an anti-permeability layer F, which is disposed between the first adhesive layer 400 and the light-shielding layer 30, and the anti-permeability layer F at least covers the surface of the light-shielding portion 300 facing away from the substrate 100.

[0047] It is understandable that when the transparent protective layer B is disposed on the side of the filter layer 500 away from the substrate 100, there is a risk of downward penetration because there is no protection below the filter layer 500. Therefore, in this embodiment, an anti-penetration layer F can be disposed between the first adhesive layer 400 and the light-shielding layer 30 to further reduce the risk of downward penetration of the filter layer 500, increase the reliability of the display device, and prevent the underlying light-emitting functional layer 20 and other film layers from being penetrated, affecting the normal light emission of the light-emitting unit 200.

[0048] Optionally, the material of the anti-permeability layer F can be the same as or different from that of the transparent protective layer B. For example, the material of the anti-permeability layer F includes at least one of silicon nitride, cyclic olefin polymer, transparent polyimide, and polymethyl methacrylate.

[0049] Optional, such as Figure 9 As shown, Figure 9 This is provided by yet another embodiment of the present invention. Figure 2 A cross-sectional view at point BB; an anti-permeability layer F and a transparent protective layer B can be set simultaneously to protect the upper and lower sides of the filter layer 500 respectively.

[0050] Optional, such as Figure 10 As shown, Figure 10 This is provided by yet another embodiment of the present invention. Figure 2 The cross-sectional view at point BB shows that the second adhesive layer N can be omitted between the filter layer 500 and the cover plate P, and the filter layer 500 can be directly bonded to the cover plate P to reduce the film thickness of the display device.

[0051] Please see Figure 11 , Figure 11 This is provided by yet another embodiment of the present invention. Figure 2 A cross-sectional view at point BB; in some optional embodiments, the light-emitting unit 200 includes a red light-emitting unit 210, a green light-emitting unit 220, and a blue light-emitting unit 230; along the direction perpendicular to the plane of the substrate 100, the thickness of the portion of the filter layer 500 above the red light-emitting unit 210 is a first thickness, the thickness of the portion of the filter layer 500 above the green light-emitting unit 220 is a second thickness, and the thickness of the portion of the filter layer 500 above the blue light-emitting unit 230 is a third thickness; the second thickness is greater than the first thickness, and the first thickness is greater than the third thickness.

[0052] Considering that the luminous efficiency of the red light-emitting unit 210, green light-emitting unit 220, and blue light-emitting unit 230 is different due to the different light-emitting materials used, and that the luminous efficiency of the green light-emitting unit 220 is greater than that of the red light-emitting unit 210, and the luminous efficiency of the red light-emitting unit 210 is greater than that of the blue light-emitting unit 230, this embodiment adjusts the thickness of the filter layer 500 corresponding to the different colored light-emitting units 200 to reduce the reflectivity of the different colored light-emitting units 200, so that the reflectivity and light emission effect of the display device meet the requirements.

[0053] It is understood that in this embodiment, the thickness of the filter layer 500 is different for different color light-emitting units 200, that is, the filter layer 500 adopts a non-uniform thickness form, which can be achieved by etching or adjusting the mask.

[0054] In some optional embodiments, the light-emitting unit 200 includes a red light-emitting unit 210, a green light-emitting unit 220, and a blue light-emitting unit 230, and the light-shielding layer 30 includes a first light-shielding portion 310, a second light-shielding portion 320, and a third light-shielding portion 330. The orthographic projection of the first light-shielding portion 310 on the substrate 100 is arranged around the orthographic projection of the red light-emitting unit 210 on the substrate 100, the orthographic projection of the second light-shielding portion 320 on the substrate 100 is arranged around the orthographic projection of the green light-emitting unit 220 on the substrate 100, and the orthographic projection of the third light-shielding portion 330 on the substrate 100 is arranged around the orthographic projection of the blue light-emitting unit 230 on the substrate 100.

[0055] It should be noted that, due to the different luminescent materials used, the decay rates of the light output brightness of the red luminescent unit 210, green luminescent unit 220, and blue luminescent unit 230 are also different, which in turn leads to different light output brightness of the red luminescent unit 210, green luminescent unit 220, and blue luminescent unit 230, affecting color shift. The decay rate of the light output brightness of the blue luminescent unit 230 is greater than that of the green luminescent unit 220, and the decay rate of the light output brightness of the green luminescent unit 220 is greater than that of the red luminescent unit 210. Therefore, in this embodiment, the heights of the first light-shielding part 310, the second light-shielding part 320, and the third light-shielding part 330 can be further adjusted. The higher the height of the light-shielding part 300, the more light-emitting unit 200 is blocked, thereby adjusting the light output brightness of the red luminescent unit 210, green luminescent unit 220, and blue luminescent unit 230 to ensure the consistency of light output.

[0056] Please see Figure 12 , Figure 12 This is provided by yet another embodiment of the present invention. Figure 1A cross-sectional view at point BB; Optionally, along the direction perpendicular to the plane of substrate 100, the height of the first light-shielding part 310 is greater than the height of the second light-shielding part 320, and the height of the second light-shielding part 320 is greater than the height of the third light-shielding part 330. Since the brightness decay of the light emitted by the red light-emitting unit 210 is relatively slow, the height of the first light-shielding part 310 can be increased to increase the blocking of the red light-emitting unit 210 and reduce the brightness of the light emitted by the red light-emitting unit 210. Correspondingly, since the brightness decay of the light emitted by the blue light-emitting unit 230 is relatively fast, the height of the first light-shielding part 310 can be reduced to increase the brightness of the light emitted by the blue light-emitting unit 230, maintain the consistency of the light emitted by the red light-emitting unit 210, the green light-emitting unit 220 and the blue light-emitting unit 230, and improve color deviation.

[0057] In addition to adjusting the height of each light-shielding part 300, the light emission of the corresponding light-emitting unit 200 can also be adjusted by adjusting other dimensional parameters of the first light-shielding part 310, the second light-shielding part 320, and the third light-shielding part 330.

[0058] Please see Figure 13 , Figure 13 This is provided by yet another embodiment of the present invention. Figure 1 A cross-sectional view at point BB; in some optional embodiments, the light-emitting unit 200 includes a red light-emitting unit 210, a green light-emitting unit 220, and a blue light-emitting unit 230, and the light-shielding layer 30 includes a first light-shielding portion 310, a second light-shielding portion 320, and a third light-shielding portion 330. The orthographic projection of the first light-shielding portion 310 on the substrate 100 surrounds the orthographic projection of the red light-emitting unit 210 on the substrate 100, and the orthographic projection of the second light-shielding portion 320 on the substrate 100 surrounds the orthographic projection of the green light-emitting unit 220 on the substrate 100. The third light-shielding part 330 is positioned in an orthographic projection configuration, with its orthographic projection on the substrate 100 surrounding the orthographic projection of the blue light-emitting unit 230 on the substrate 100. The first light-shielding part 310 includes a first side surface C1, the second light-shielding part 320 includes a second side surface C2, and the third light-shielding part 330 includes a third side surface C3. The angle α1 between the extension surface of the first side surface and the substrate is greater than the angle α2 between the extension surface of the second side surface and the substrate, and the angle α2 between the extension surface of the second side surface and the substrate is greater than the angle α3 between the extension surface of the third side surface and the substrate.

[0059] It should be noted that the larger the angle α1 between the extended surface of the first side and the substrate, the greater the slope of the first side C1. This makes it easier for the light emitted by the red light-emitting unit 210 to be blocked by the first side C1. Furthermore, the angle α1 between the extended surface of the first side and the substrate is greater than the angle α2 between the extended surface of the second side and the substrate. This means the second side C2 is flatter than the first side C1, requiring the light emitted by the green light-emitting unit 220 to travel a longer distance (i.e., a longer optical path) before being blocked by the second side C2. Therefore, the second side C2 provides less obstruction to the light emitted by the green light-emitting unit 220. Thus, by limiting the angle α1 between the extended surface of the first side and the substrate to be greater than the angle α2 between the extended surface of the second side and the substrate, the light emission of the green light-emitting unit 220 can be increased compared to the red light-emitting unit 210.

[0060] Similarly, the angle α2 between the extension surface of the second side and the substrate can be limited to be greater than the angle α3 between the extension surface of the third side and the substrate, so as to increase the light output brightness of the blue light-emitting unit 230, maintain the consistency of light output of the red light-emitting unit 210, the green light-emitting unit 220 and the blue light-emitting unit 230, and improve color deviation.

[0061] Please see Figure 14 , Figure 14 This is provided by yet another embodiment of the present invention. Figure 1 A cross-sectional view at point BB; in some optional embodiments, the display device further includes an encapsulation layer 900 and an anti-reflection layer Z, wherein the encapsulation layer 900 is located between the light-shielding layer 30 and the light-emitting functional layer 20, and the anti-reflection layer Z is located between the encapsulation layer 900 and the light-emitting functional layer 20.

[0062] The antireflection layer Z can be set to work in conjunction with the filter layer 500 to further enhance the reflectivity of the display device. Specifically, the refractive index of the antireflection layer Z material can be matched with the refractive index of the filter layer 500 material to reduce the reflectivity.

[0063] The antireflection layer Z can be patterned, that is, a hollowed-out layer is formed on the antireflection layer Z by etching or other methods to reduce the overall reflectivity of the display device. According to the inventor's research and experiments, the metal antireflection ratio is 16.2%. The material of the antireflection layer Z can be Ag (silver), Yb (ytterbium), magnesium-silver alloy or other metals or metal composite films.

[0064] The antireflection layer Z is positioned below the encapsulation layer 900 to ensure that the encapsulation layer 900 can also provide encapsulation and protection for the antireflection layer Z.

[0065] Optionally, the orthographic projection of the antireflection layer Z on the substrate 100 and the orthographic projection of the light-emitting unit 200 on the substrate 100 do not overlap, so as to avoid affecting the light emission effect of the light-emitting unit 200.

[0066] In some alternative embodiments, along the direction away from the substrate 100, the encapsulation layer 900 includes a first inorganic layer 910, a first organic layer 920 and a second inorganic layer 930 stacked together; the antireflection layer Z is located between the first inorganic layer 910 and the light-emitting functional layer 20.

[0067] It should be noted that the material of the first inorganic layer 910 includes inorganic materials. Specifically, the inorganic materials can be silicon nitride, silicon oxide, and silicon oxynitride, and can be formed using CVD (Chemical Vapor Deposition) technology.

[0068] Optionally, the material of the second organic layer may include organic materials. The organic material may be made of resin or polymeric organic materials, and may be formed using IJP (Inkjet printing) technology.

[0069] Optionally, the material of the third inorganic layer includes inorganic materials. Adding an inorganic encapsulation layer 900 outside the organic encapsulation layer 900 can further improve the encapsulation effect of the encapsulation layer 900. In this embodiment, the material of the third inorganic layer can be the same as or different from the material of the first inorganic layer 910, and there is no special limitation.

[0070] Optionally, the material of the first inorganic layer 910 is the same as that of the third inorganic layer, so that the first inorganic layer 910 and the third inorganic layer can be prepared using the same equipment, which can simplify the manufacturing process of the display panel 10.

[0071] Please see Figure 14 In this embodiment, the antireflection layer Z is located between the first inorganic layer 910 and the light-emitting functional layer 20, so as to encapsulate and protect the antireflection layer Z using the first inorganic layer 910.

[0072] In some optional embodiments, the material of the filter layer 500 includes an ultraviolet light absorbing material to absorb ultraviolet light from the ambient light, reduce ultraviolet light damage, and improve the reliability and service life of the filter layer 500.

[0073] Please see Figure 15 The present invention also provides a method for manufacturing a display device, which is used to manufacture the display device in any of the above embodiments, comprising the following steps: S110: A substrate 100 is provided, and a light-emitting functional layer 20 is formed on one side of the substrate 100. The light-emitting functional layer 20 includes light-emitting units 200, such as... Figure 16 As shown; S120: A light-shielding layer 30 is formed on the side of the light-emitting functional layer 20 facing away from the substrate 100. The light-shielding layer 30 includes a plurality of spaced-apart light-shielding portions 300. The orthographic projection of the light-shielding portion 300 on the substrate 100 and the orthographic projection of the light-emitting unit 200 on the substrate 100 do not overlap. Figure 17 As shown; S130: A first adhesive layer 400 is formed on the side of the light-shielding layer 30 facing away from the substrate 100, such as... Figure 18 As shown; S140: Form a filter layer 500 and fix the filter layer 500 to the side of the first adhesive layer 400 facing away from the substrate 100, such as... Figure 3 As shown.

[0074] In the display device fabrication method provided in this embodiment of the invention, the formed filter layer 500 can be integrally formed without the need for patterning of the light-emitting units 200 with different emission colors. Compared with the prior art, it eliminates the need to form color resists corresponding to different emission colors of the light-emitting units 200 through a mask, thus reducing production costs. On the other hand, since the filter layer 500 is separately fixed by the first adhesive layer 400, the filter layer 500 can be fabricated independently. For example, the filter layer 500 can be fabricated through a separate high-temperature process, and then bonded and fixed by the first adhesive layer 400. The material of the filter layer 500 fabricated by the high-temperature process has more selectivity. By systematically optimizing the transmittance, absorptivity, and reflectivity of the spectrum of the filter layer 500, that is, by achieving absorption of the emission spectrum of the light-emitting units 200 with different emission colors through the spectrum, the reflectivity can be reduced while improving the light emission efficiency.

[0075] In step S110, the substrate 100 may include a substrate and an array layer. The substrate can be formed through processes such as coating, curing, and film deposition. The substrate can be a rigid substrate, such as a glass substrate; or it can be a flexible substrate, and its material can be polyimide, polystyrene, polyethylene terephthalate, poly(p-xylene), polyethersulfone, or polyethylene naphthalate. The substrate is mainly used to support the devices disposed on it.

[0076] Each film layer in the light-emitting unit 200 can be formed by processes such as vapor deposition.

[0077] In step S120, the light-shielding layer 30 can be made of black matrix material or other light-shielding material, without any special limitation.

[0078] In step S130, depending on the material of the first adhesive layer 400, the first adhesive layer 400 can be formed using processes such as coating and curing. The first adhesive layer 400 can be made of OCR (Optical Clear Resin), which, because it is liquid, is also called liquid optical adhesive, optical water-based adhesive, or LOCA. The first adhesive layer 400 can be used to bond and fix the filter layer 500 to ensure the stable fixation of the filter layer 500.

[0079] Through the inventor's research and experiments, it was found that there are few materials available for the low-temperature fabrication of the filter layer 500, and the difference between the spectrum and the color resistance is large. This causes ambient light to be able to penetrate the filter layer 500, be reflected by the first electrode layer 700, and then be emitted through the filter layer 500, resulting in high reflectivity and poor ambient contrast, which affects the performance of the display panel 10.

[0080] To address the aforementioned issues, in step S140 of this application, a filter layer 500 can be fabricated using a high-temperature process. The filter layer 500 is then fixed to the side of the first adhesive layer 400 facing away from the substrate 100. This allows for a better match between the spectrum and color resist of the material in the filter layer 500 fabricated using the high-temperature process. The filter layer 500 can replace the color resist, and the high-temperature fabrication process allows for greater material selection. Through systematic optimization of the transmittance, absorptivity, and reflectivity of the filter layer 500's spectrum, absorption of the RGB spectrum is achieved, thereby reducing reflectivity and improving light extraction efficiency. Optionally, when no other film layers are provided between the filter layer 500 and the first adhesive layer 400, the filter layer 500 can be bonded to the first adhesive layer 400.

[0081] The filter layer 500, formed through high-temperature fabrication, can match the spectrum of existing OLED devices, improving light extraction efficiency; on the other hand, it reduces screen reflectivity by absorbing ambient light. The materials available for the high-temperature fabrication of the filter layer 500 are also more diverse.

[0082] In some alternative embodiments, after the step of forming the first adhesive layer 400 on the side of the light-shielding layer 30 away from the substrate 100, the method includes: providing a cover plate P; forming a light filter layer 500 on one side of the cover plate P; and fixing the light filter layer 500 to the side of the first adhesive layer 400 away from the substrate 100.

[0083] In this embodiment, the cover plate P and the filter layer 500 can be fixed together by means of bonding to form an integral structure. Then, this integral structure including the cover plate P and the filter layer 500 is fixed to the substrate 100 with the first adhesive layer 400. For example, the filter layer 500 can be directly bonded to the first adhesive layer 400, and the cover plate P is located on the side of the filter layer 500 away from the first adhesive layer 400. Alternatively, other film layers, such as a transparent protective layer B, can be provided between the first adhesive layer 400 and the filter layer 500.

[0084] It is understood that in this embodiment, the filter layer 500 and the film layer on the P side of the cover plate are first bonded and fixed, and then the filter layer 500 and the film layer located on the substrate 100 side are fixed after the bonding and fixing are completed.

[0085] In some alternative embodiments, between the steps of providing the cover plate P and forming the filter layer 500 on one side of the cover plate P, the method further includes: sequentially forming a second adhesive layer N and a transparent protective layer B on one side of the cover plate P; the surface of the transparent protective layer B facing away from the cover plate P is bonded to the filter layer 500.

[0086] Understandably, in this embodiment, the transparent protective layer B can be fixed to the second adhesive material on one side of the cover plate P, and then the transparent protective layer B and the filter layer 500 located on the substrate 100 are bonded together. The transparent protective layer B is disposed above the filter layer 500, which can prevent the filter layer 500 from penetrating upward, reduce the risk of the second adhesive layer N above the filter layer 500 and the cover plate P film layer being penetrated, and improve the reliability of the display panel 10.

[0087] The transparent protective layer B can be formed by processes such as coating and inkjet printing. For example, the material of the transparent protective layer B includes at least one of transparent polyimide and polyethylene terephthalate.

[0088] The display device provided in the embodiments of the present invention can be an organic light-emitting diode (OLED) display device, a quantum dot light-emitting diode (QLED) device, or a micro flat panel display device (Micro-OLED or Micro-LED), etc.

[0089] The display device provided in this embodiment of the invention can be applied to mobile phones or any electronic product with display function, including but not limited to the following categories: televisions, laptops, desktop monitors, tablets, digital cameras, smart bracelets, smart glasses, in-vehicle displays, medical devices, industrial control equipment, touch interactive terminals, etc. This embodiment of the invention does not impose any special limitations on these.

[0090] The above are merely specific embodiments of the present invention. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention.

[0091] It should also be noted that the exemplary embodiments mentioned in this invention describe methods or systems based on a series of steps or apparatus. However, this invention is not limited to the order of the steps described above; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

Claims

1. A display device, characterized by comprising: The application relates to a display panel. The display panel comprises a substrate, a light-emitting functional layer arranged on one side of the substrate, the light-emitting functional layer comprising light-emitting units, a light-blocking layer arranged on the side of the light-emitting functional layer away from the substrate, the light-blocking layer comprising a plurality of spaced light-blocking portions, the orthographic projection of the light-blocking portions on the substrate and the orthographic projection of the light-emitting units on the substrate not overlapping, a first adhesive layer arranged on the side of the light-blocking layer away from the substrate, and a light-filtering layer fixed on the side of the first adhesive layer away from the substrate. The light-filtering layer comprises scattering particles. The scattering particles in the light-filtering layer are uniformly distributed. The light-emitting units comprise red light-emitting units, green light-emitting units and blue light-emitting units. The orthographic projection of the scattering particles on the substrate and the orthographic projection of the red light-emitting units on the substrate at least partially overlap, and / or the orthographic projection of the scattering particles on the substrate and the orthographic projection of the green light-emitting units on the substrate at least partially overlap.

2. The display device according to claim 1, wherein The display panel further comprises a transparent protective layer, a second adhesive layer and a cover plate.

3. The display device according to claim 2, wherein The transparent protective layer is arranged on the side of the light-filtering layer away from the substrate, the cover plate is arranged on the side of the transparent protective layer away from the substrate, and the cover plate is connected to the transparent protective layer through the second adhesive layer and the transparent protective layer, or the transparent protective layer is arranged between the light-filtering layer and the first adhesive layer, the cover plate is arranged on the side of the light-filtering layer away from the substrate, and the cover plate is connected to the light-filtering layer through the second adhesive layer.

4. The display device according to claim 2, wherein The material of the transparent protective layer comprises at least one of transparent polyimide and polyethylene terephthalate. The display panel further comprises an anti-permeation layer arranged between the first adhesive layer and the light-blocking layer, and the anti-permeation layer covers at least the surface of the side of the light-blocking portions away from the substrate.

5. The display device according to claim 1, wherein The material of the anti-permeation layer comprises at least one of silicon nitride, cycloolefin polymer, transparent polyimide and polymethyl methacrylate. The light-emitting units comprise red light-emitting units, green light-emitting units and blue light-emitting units.

6. The display device according to claim 5, wherein In a direction perpendicular to the plane in which the substrate is arranged, the thickness of the part of the light-filtering layer above the red light-emitting units is a first thickness, the thickness of the part of the light-filtering layer above the green light-emitting units is a second thickness, and the thickness of the part of the light-filtering layer above the blue light-emitting units is a third thickness.

7. The display device according to claim 1, wherein The second thickness is greater than the first thickness, and the first thickness is greater than the third thickness.

8. The display device according to claim 7, wherein The light-emitting units comprise red light-emitting units, green light-emitting units and blue light-emitting units, the light-blocking layer comprises first light-blocking portions, second light-blocking portions and third light-blocking portions, the orthographic projection of the first light-blocking portions on the substrate is arranged around the orthographic projection of the red light-emitting units on the substrate, the orthographic projection of the second light-blocking portions on the substrate is arranged around the orthographic projection of the green light-emitting units on the substrate, and the orthographic projection of the third light-blocking portions on the substrate is arranged around the orthographic projection of the blue light-emitting units on the substrate.

9. The display device according to claim 1, wherein In a direction perpendicular to the plane in which the substrate is arranged, the height of the first light-blocking portions is greater than the height of the second light-blocking portions, and the height of the second light-blocking portions is greater than the height of the third light-blocking portions. ​ ​ 10. The display device according to claim 1, wherein ​ ​ 11. The display device according to claim 1, wherein The light-emitting unit comprises a red light-emitting unit, a green light-emitting unit and a blue light-emitting unit, and the light-blocking layer comprises a first light-blocking part, a second light-blocking part and a third light-blocking part, a normal projection of the first light-blocking part on the substrate is arranged around a normal projection of the red light-emitting unit on the substrate, a normal projection of the second light-blocking part on the substrate is arranged around a normal projection of the green light-emitting unit on the substrate, and a normal projection of the third light-blocking part on the substrate is arranged around a normal projection of the blue light-emitting unit on the substrate. The first light-blocking part comprises a first side surface, the second light-blocking part comprises a second side surface, and the third light-blocking part comprises a third side surface, an included angle between an extension surface of the first side surface and the substrate is greater than an included angle between an extension surface of the second side surface and the substrate, and the included angle between the extension surface of the second side surface and the substrate is greater than an included angle between an extension surface of the third side surface and the substrate.

12. The display device according to claim 1, wherein Further comprising an encapsulation layer between the light-blocking layer and the light-emitting functional layer, and an anti-reflection layer between the encapsulation layer and the light-emitting functional layer.

13. The display device of claim 12, wherein, In a direction away from the substrate, the encapsulation layer comprises a first inorganic layer, a first organic layer and a second inorganic layer arranged in a stack. The anti-reflection layer is between the first inorganic layer and the light-emitting functional layer.

14. The display device of claim 1, wherein The filter layer comprises a gray flat layer.

15. The display device of claim 1, wherein, The material of the filter layer comprises at least one of anthrone, imide, perylene imide, naphthalimide and rhodamine.

16. The display device of claim 1, wherein The material of the filter layer comprises an ultraviolet light absorbing material.

17. A method for producing a display device according to any one of claims 1 to 16, characterized by The method comprises the following steps: Providing a substrate, forming a light-emitting functional layer on one side of the substrate, and the light-emitting functional layer comprising a light-emitting unit; Forming a light-blocking layer on a side of the light-emitting functional layer away from the substrate, and the light-blocking layer comprising a plurality of spaced light-blocking parts, and a normal projection of the light-blocking part on the substrate and a normal projection of the light-emitting unit on the substrate not overlapping; Forming a first adhesive layer on a side of the light-blocking layer away from the substrate; Forming a filter layer and fixing the filter layer on a side of the first adhesive layer away from the substrate.

18. The method of claim 17, wherein the display device is prepared by a method comprising: In the step of forming the filter layer, the method comprises: Preparation of the filter layer by high-temperature processing, and bonding the filter layer and the first adhesive layer.

19. The method for manufacturing a display device according to claim 17, characterized in that, After the step of forming the first adhesive layer on a side of the light-blocking layer away from the substrate, the method comprises: Providing a cover plate; Forming a filter layer on a side of the cover plate; Fixing the filter layer on a side of the first adhesive layer away from the substrate.

20. The method of claim 19, wherein the display device is prepared by a method comprising: Between the steps of providing the cover plate and forming the filter layer on a side of the cover plate, the method further comprises: Forming a second adhesive layer and a transparent protective layer in sequence on a side of the cover plate; The surface of the transparent protective layer away from the cover plate is attached to the filter layer.

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