Mask assembly, display panel and display device

Abstract

The utility model provides a mask assembly, a display panel and a display device, the mask assembly comprises a mask frame and a plurality of mask sheets, and the mask frame comprises at least one mask opening and a frame part surrounding the mask opening; the plurality of mask sheets are overlapped on the mask frame; each mask sheet comprises a plurality of evaporation areas and a separation part surrounding the evaporation areas, the evaporation areas of the mask sheets are overlapped with the mask openings, the mask openings extend in the first direction, the size of the mask openings in the first direction is larger than the size of the mask openings in the second direction, and the first direction intersects with the second direction; according to the mask assembly, the mask sheet extends in the first direction, the size of each evaporation area in the first direction is larger than that of each evaporation area in the second direction, and the mask assembly can effectively improve the utilization rate of the mask frame so as to have high typesetting efficiency, so that the productivity can be greatly improved.

Description

TECHNICAL FIELD

[0001] At least one embodiment of the present application relates to a mask assembly, a display panel and a display device. BACKGROUND

[0002] An organic light-emitting diode (OLED) display screen is a new generation of display after liquid crystal display, which has the advantages of wide display color gamut, fast response speed, foldable and the like. SUMMARY

[0003] At least one embodiment of the present application provides a mask assembly, comprising a mask frame and a plurality of mask sheets, the mask frame comprising at least one mask opening and a frame portion surrounding the mask opening; the plurality of mask sheets are lapped on the mask frame; each of the mask sheets comprises a plurality of evaporation areas and a separation portion surrounding the plurality of evaporation areas, the plurality of evaporation areas of the mask sheet overlaps with the mask opening, the mask opening extends along a first direction, the size of the mask opening in the first direction is greater than the size of the mask opening in a second direction, and the first direction intersects with the second direction, the mask sheet extends along the first direction, and the size of each evaporation area in the first direction is greater than the size of the evaporation area in the second direction.

[0004] For example, according to the mask assembly provided by at least one embodiment of the present application, the sum of the sizes of the plurality of evaporation areas in the first direction in the mask opening is greater than the sum of the sizes of the plurality of evaporation areas in the second direction in the mask opening.

[0005] For example, according to the mask assembly provided by at least one embodiment of the present application, the minimum distance between the evaporation area of the mask sheet and the edge of the mask opening is not greater than the distance between adjacent evaporation areas.

[0006] For example, according to the mask assembly provided by at least one embodiment of the present application, the minimum distance between the evaporation area of the mask sheet and the edge of the mask opening in the first direction is 15mm-20mm, and the minimum distance between the evaporation area of the mask sheet and the edge of the mask opening in the second direction is 30mm.

[0007] For example, according to the mask assembly provided by at least one embodiment of the present application, the size of the mask opening in the first direction is 1400mm-1600mm, and the size of the mask opening in the second direction is 800mm-1000mm.

[0008] For example, the mask assembly provided by at least one embodiment of the present application has the advantages that the ratio of the size of the mask sheet in the first direction to the size of the mask opening in the first direction is greater than 1 and less than 1.5.

[0009] For example, the mask assembly provided by at least one embodiment of the present application has the advantages that the plurality of evaporation areas of the mask sheet are sequentially and spacedly arranged in the mask opening, and the ratio between the sum of the sizes of the plurality of evaporation areas of the mask sheet in the first direction and the size of the mask opening in the first direction is greater than 0.5 and less than 1.

[0010] For example, the mask assembly provided by at least one embodiment of the present application has the advantages that the ratio between the size of the mask sheet in the second direction and the size of the mask opening in the second direction is greater than 0.05 and less than 0.6.

[0011] For example, the mask assembly provided by at least one embodiment of the present application has the advantages that the mask sheet comprises a fixing portion at two ends of the mask sheet, the fixing portion is fixed with the frame portion of the mask frame, the fixing portion comprises a clamping area, the clamping area comprises a main body portion and a plurality of protruding portions, the plurality of protruding portions are located on a side of the main body portion away from the mask frame, the protruding portions are connected with the main body portion, the plurality of protruding portions are sequentially and spacedly arranged along the second direction, and the number of the plurality of protruding portions in the clamping area is greater than 3.

[0012] For example, the mask assembly provided by at least one embodiment of the present application has the advantages that the number of the plurality of protruding portions in the clamping area is 3-8.

[0013] For example, the mask assembly provided by at least one embodiment of the present application has the advantages that, in the second direction, the size of the evaporation area of the mask sheet in the first direction corresponding to the middle part of the mask sheet is greater than the average size of the evaporation area.

[0014] For example, the mask assembly provided by at least one embodiment of the present application has the advantages that the plurality of evaporation areas of the mask sheet are sequentially and spacedly arranged in the first direction, the separation portion of the mask sheet comprises a first supporting portion between adjacent evaporation areas, the mask frame comprises a plurality of mask openings, the mask assembly further comprises at least one second supporting portion, the second supporting portion is between adjacent mask openings, and at least part of the first supporting portion overlaps at least part of the second supporting portion.

[0015] For example, the mask assembly provided by at least one embodiment of the present application has the advantages that the first supporting portion, the second supporting portion of the mask sheet and the mask frame are sequentially and stackedly arranged.

[0016] At least one embodiment of the present invention provides a display panel, wherein at least a portion of the structure of the display panel is manufactured using the mask assembly provided in any embodiment of the present invention.

[0017] For example, according to at least one embodiment of the present invention, a display panel is provided, wherein the size of the display panel in the first direction is larger than the size in the second direction, and the display panel includes multiple sub-pixels, and in the second direction, the spacing between adjacent sub-pixels is unequal.

[0018] At least one embodiment of the present invention provides a display device, which includes the display panel provided by any embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, rather than limiting the present invention.

[0020] Figure 1 A schematic diagram of the partial structure of a display panel.

[0021] Figure 2 To correspond to Figure 1 Schematic diagram of the mask assembly of the display panel shown.

[0022] Figure 3 A schematic diagram of the partial structure of another display panel.

[0023] Figure 4 To correspond to Figure 3 Schematic diagram of the mask assembly of the display panel shown.

[0024] Figure 5 A schematic diagram of a mask assembly provided for at least one embodiment of the present invention.

[0025] Figure 6 for Figure 5 Schematic diagram of the mask frame of the mask assembly shown.

[0026] Figure 7 A schematic diagram of another mask assembly provided for at least one embodiment of the present invention.

[0027] Figure 8 A schematic diagram of yet another mask assembly provided for at least one embodiment of the present utility model.

[0028] Figure 9 A schematic diagram of yet another mask assembly provided for at least one embodiment of the present utility model.

[0029] Figure 10 A schematic diagram of mechanical simulation results of a mask assembly provided in at least one embodiment of the present utility model.

[0030] Figure 11 A schematic diagram of a mask.

[0031] Figure 12 A schematic diagram of yet another mask assembly provided for at least one embodiment of the present invention.

[0032] Figure 13 Based on Figure 12 Schematic diagram of the distribution of multiple sub-pixels in a display panel formed by the mask assembly.

[0033] Figure 14 A schematic diagram of the partial structure of a mask provided in at least one embodiment of the present utility model.

[0034] Figure 15 A schematic diagram of the compensation effect of a mask provided in at least one embodiment of the present utility model.

[0035] Figure 16 A schematic diagram of a mask provided for at least one embodiment of the present utility model.

[0036] Figure 17 A schematic diagram of yet another mask assembly provided for at least one embodiment of the present invention. DETAILED DESCRIPTION

[0037] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Unless otherwise defined, technical or scientific terms used in this utility model should have the ordinary meaning understood by people with ordinary skills in the field to which this utility model belongs. The words "first", "second" and similar terms used in this utility model do not indicate any order, quantity or importance, but are simply used to distinguish different components. The words "include" or "comprising" and similar words mean that the elements or objects listed before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0039] The features "perpendicular," "parallel," and "identical" used in the embodiments of the present invention include the features "perpendicular," "parallel," and "identical" in the strict sense, as well as "approximately perpendicular," "approximately parallel," and "approximately identical" that include certain errors, taking into account the errors associated with the measurement of specific quantities (that is, the limitations of the measurement system), and represent acceptable deviations for specific values ​​determined by ordinary technicians in this field. The "center" in the embodiments of the present invention can include a position strictly at the geometric center and a position approximately at the center of a small area around the geometric center.

[0040] With the continuous advancement of OLED display technology, users are increasingly demanding the immersive experience of large-screen displays. Larger screens enhance the visual quality of in-vehicle displays and make the interface design and interaction methods of smart cockpits more intuitive and user-friendly. Large screens allow users to more easily browse and select the functions and information they need, thereby enhancing the quality of the immersive experience.

[0041] As the size of display screens gradually increases, in order to meet performance requirements such as higher resolution, wider color gamut, and faster response speed to bring a better visual experience, the shipment volume of display panels needs to continue to increase.

[0042] Figure 1 A schematic diagram of a partial structure of a display panel; Figure 2 To correspond to Figure 1 Schematic diagram of the mask assembly of the display panel shown.

[0043] For example, Figure 1 As shown, the display panel 01 includes a display area 10 and a frame area 20, the display area 10 is configured to display, and the frame area 20 surrounds the display area 10. The display panel 01 also includes a binding area located on one side of the display area 10, and the binding area is an area for connecting a flexible printed circuit (FPC) or a printed circuit board (PCB). For example, the display area 10 is roughly rectangular, and the ratio of the sizes of the adjacent first edge and the second edge is approximately 16:9. For example, the size of the first edge of the display area 10 is 467 mm, and the size of the second edge is 263 mm. For example, the display panel 01 is a 21-inch display panel. For example, the resolution of the display panel 01 is 3840×2160 pixels, which can be called 4K resolution or ultra high definition (UHD) resolution.

[0044] For example, Figure 2 As shown, the mask assembly 010 is used to make Figure 1The display panel 01 shown. For example, the mask assembly 010 includes a mask frame 0100 and a plurality of mask sheets 0200, and the plurality of mask sheets 0200 are located on the mask frame 0100 and are arranged in sequence in a first direction X. The size of the opening area of ​​the mask frame 0100 in the first direction X is greater than the size in the second direction Y. For example, the size of the opening area of ​​the mask frame 0100 in the first direction X is 1500 mm, and the size of the opening area of ​​the mask frame 0100 in the second direction Y is 925 mm. For example, the mask sheet 0200 includes an evaporation area 0201 for forming the display panel 01, and the size of the evaporation area 0201 in the second direction Y is greater than the size in the first direction X. For example, one evaporation area 0201 of the mask sheet 0200 is used to form one display panel. Figure 2 Only the opening area of ​​the mask frame 0100 is schematically shown, and the frame portion of the mask frame 0100 is not shown and is not limited here.

[0045] Figure 3 is a schematic diagram of a partial structure of another display panel; Figure 4 To correspond to Figure 3 Schematic diagram of the mask assembly of the display panel shown.

[0046] For example, Figure 3 As shown, the display panel 02 and Figure 1 The display panels 01 shown differ in size and resolution. For example, the ratio of the sizes of the adjacent first edge E1 and second edge E2 of the display panel 02 is approximately 32.5:9. For example, the first edge E1 of the display area 10 measures 712 mm, while the second edge E2 measures 197 mm. For example, the display panel 02 is a 29-inch display panel. For example, the resolution of the display panel 02 is 6300×1740 pixels.

[0047] For example, Figure 4 As shown, the mask assembly 020 and Figure 2 The difference between the mask assembly 010 shown is that the size of the evaporation area 0201 of the mask sheet 0200 is different, so as to form the display panel 02 , and the rest of the structures are the same.

[0048] However, if Figure 2 and Figure 4 As shown, the longer edge of the evaporation area 0201 of the mask sheet 0200 (i.e., the edge extending along the second direction Y) is arranged parallel to the shorter edge of the mask opening 0100 (i.e., the edge extending along the second direction Y). This layout method makes the total number of evaporation areas 0201 in the mask assembly smaller, resulting in fewer display panels that can be produced. Therefore, the structural utilization rate of the mask assembly (such as the utilization rate of the mask frame, etc.) is low, which in turn leads to low production capacity and product yield, which is not conducive to reducing manufacturing costs.

[0049] For example, for Figure 1 For the display panel shown, for example, when the size of the binding area in the first direction X is 6.5 mm, the number of mask sheets in the corresponding mask assembly is 10, and the utilization rate of the mask frame is about 46.70%; when the size of the binding area in the first direction X is 4 mm, the number of mask sheets in the corresponding mask assembly is 10, and the utilization rate of the mask frame is about 47.64%. For example, for Figure 3 For the display panel shown, when the size of the binding area in the first direction X is 6.5 mm, the number of mask sheets in the corresponding mask assembly is 12, and the utilization rate of the mask frame is approximately 64.59%; when the size of the binding area in the first direction X is 4 mm, the number of mask sheets in the corresponding mask assembly is 12, and the utilization rate of the mask frame is approximately 66.30%.

[0050] Therefore, it is particularly important to design a mask assembly with higher throughput.

[0051] At least one embodiment of the present invention provides a mask assembly, comprising: a mask frame and multiple mask sheets, the mask frame comprising at least one mask opening and a frame portion surrounding the mask opening; multiple mask sheets overlapped on the mask frame; each mask sheet comprises multiple evaporation areas and a partition portion surrounding the multiple evaporation areas, the multiple evaporation areas of the mask sheet overlap with the mask opening, the mask opening extends along a first direction, the size of the mask opening in the first direction is larger than the size in the second direction, and the first direction intersects with the second direction, the mask sheet extends along the first direction, the size of each evaporation area in the first direction is larger than the size of the evaporation area in the second direction.

[0052] In the mask assembly provided by at least one embodiment of the present invention, by making the longer edge of the evaporation area of ​​the mask sheet (i.e., the edge extending along the first direction X) and the longer edge of the mask opening (i.e., the edge extending along the first direction X) parallel to each other, this layout method can make the total number of evaporation areas in the mask assembly larger, so that more display panels can be produced, thereby improving the structural utilization rate of the mask assembly (such as the utilization rate of the mask frame, etc.), which is beneficial to significantly improve production capacity and product yield, and help reduce manufacturing costs.

[0053] At least one embodiment of the present invention further provides a display panel, at least part of the structure of which is manufactured using the mask assembly provided in any embodiment of the present invention.

[0054] At least one embodiment of the present invention further provides a display device, which includes the display panel provided by any embodiment of the present invention.

[0055] Figure 5A schematic diagram of a mask assembly provided for at least one embodiment of the present invention; Figure 6 for Figure 5 Schematic diagram of the mask frame of the mask assembly shown.

[0056] like Figure 5 and Figure 6 As shown, the mask assembly includes a mask frame 100 and multiple mask sheets 200. The mask frame 100 includes at least one mask opening 110 and a frame portion 120 surrounding the mask opening 110. For example, at least a portion of the frame portion 120 is located outside the mask opening 110. This embodiment is described using an example in which the mask assembly includes a single mask opening 110, but the invention is not limited thereto. For example, the mask assembly may include multiple mask openings 110, with portions of the frame portion 120 located between adjacent mask openings 110.

[0057] like Figure 5 and Figure 6 As shown, multiple mask sheets 200 are overlapped on the mask frame 100. Each mask sheet 200 includes multiple evaporation regions 210 and a separator 220 surrounding the multiple evaporation regions 210. The multiple evaporation regions 210 of the mask sheet 200 are located in the mask opening 110. Thus, the separator 220 can separate the multiple evaporation regions 210.

[0058] For example, the display panel includes a display area and a peripheral area surrounding the display area, and the display area includes a plurality of sub-pixels arranged in an array, such as red sub-pixels that emit red light, green sub-pixels that emit green light, and blue sub-pixels that emit blue light, etc. The display area is configured to display an image. For example, each evaporation area of ​​the mask sheet corresponds to a main display area, but the embodiments of the present invention do not limit the specific size of each evaporation area. For example, the shape of the evaporation area can be set according to the shape of the main display area. For example, the multiple evaporation areas in the mask sheet can have different shapes, and the embodiments of the present invention do not limit this. For example, each evaporation area of ​​the mask sheet can be used as an opening for forming an encapsulation layer in the display panel, and the above-mentioned encapsulation film layer can include inorganic materials such as silicon nitride and silicon oxide, and the embodiments of the present invention do not limit this. For example, each evaporation area of ​​the mask sheet can also be used as an opening for forming a common layer in the display panel, such as a hole transport layer, an electron transport layer, and other entire film layers.

[0059] like Figure 5 and Figure 6As shown, the mask opening 110 extends along a first direction X, with the size of the mask opening 110 in the first direction X being greater than the size in the second direction Y, and the first direction X and the second direction Y intersecting. For example, the mask opening 110 is generally rectangular, but is not limited thereto. The mask sheet 200 extends along the first direction X, and the size of each evaporation region 210 in the first direction X is greater than the size of the evaporation region 210 in the second direction Y. For example, multiple mask sheets 200 are arranged in sequence along the second direction Y. For example, the multiple evaporation regions 210 located in the mask opening 110 are arranged in an array. Each mask sheet 200 includes at least two evaporation regions 210.

[0060] In the mask assembly provided by at least one embodiment of the present invention, by making the longer edge of the evaporation area of ​​the mask sheet (i.e., the edge extending along the first direction X) and the longer edge of the mask opening (i.e., the edge extending along the first direction X) parallel, this layout method can make the total number of evaporation areas in the mask assembly larger, so that more display panels can be produced, thereby improving the structural utilization rate of the mask assembly (such as the utilization rate of the mask frame, etc.), which is beneficial to improving production capacity and product yield, and reducing manufacturing costs.

[0061] For example, Figure 5 As shown, a plurality of evaporation regions 210 ( Figure 5 The sum of the dimensions of the ten evaporation regions (shown) in the first direction X is greater than the sum of the dimensions of the plurality of evaporation regions 210 in the mask opening 110 in the second direction Y. For example, the evaporation regions 210 are substantially rectangular.

[0062] Such an arrangement is beneficial to increasing the total number of vapor deposition areas located in the mask openings and improving the utilization rate of the mask frame.

[0063] For example, Figure 5 As shown, the minimum distance L between the evaporation region 210 of the mask sheet 200 and the edge of the mask opening 110 is no greater than the distance between adjacent evaporation regions 210. For example, the minimum distance L between the evaporation region 210 of the mask sheet 200 and the edge of the mask opening 110 is substantially equal to the distance between adjacent evaporation regions 210. For example, the minimum distance between the evaporation region 210 of the mask sheet 200 and the edge of the mask opening 110 in the first direction X is 15 mm to 20 mm, such as 15 mm to 18 mm, 16 mm to 19 mm, or 17 mm to 20 mm, but the embodiments of the present invention are not limited thereto. For example, the minimum distance between the evaporation region 210 of the mask sheet 200 and the edge of the mask opening 110 in the second direction Y is 30 mm, such as 30 mm to 35 mm, 32 mm to 36 mm, or 34 mm to 38 mm, but the embodiments of the present invention are not limited thereto.

[0064] Therefore, the number of the vapor deposition areas located in the mask opening can be increased as much as possible while meeting the size requirement of the vapor deposition areas, thereby improving the utilization rate of the mask frame.

[0065] For example, Figure 5 As shown, the dimension M1 of the mask opening 110 in the first direction X is 1400 mm to 1600 mm, such as 1450 mm to 1500 mm, 1500 mm to 1550 mm, 1550 mm to 1600 mm, or other values ​​within the range of 1400 mm to 1600 mm, which is not limited in the embodiments of the present invention. For example, the dimension M2 of the mask opening 110 in the second direction Y is 800 mm to 1000 mm, such as 800 mm to 850 mm, 850 mm to 900 mm, 950 mm to 1000 mm, or other values ​​within the range of 800 mm to 1000 mm, which is not limited in the embodiments of the present invention.

[0066] By ensuring that the dimensions of the mask opening in the first direction and the second direction are within the above-mentioned range, it is beneficial to increase the total number of mask openings in the multiple mask sheets arranged sequentially along the second direction. For example, it can be made greater than the total number of mask openings located in the mask openings when the multiple mask sheets are arranged sequentially along the first direction, thereby improving the utilization rate of the mask frame, and further facilitating the improvement of production capacity and product yield.

[0067] For example, Figure 5 As shown, the ratio of the dimension H1 of the mask 200 in the first direction X to the dimension M1 of the mask opening 110 in the first direction X is greater than 1 and less than 1.5. For example, in the first direction X, the dimension H1 of the mask 200 in the first direction X is greater than the dimension of the mask opening 110. For example, the dimension H1 of the mask 200 in the first direction X can be 1500 mm to 2000 mm, such as at least one of 1500 mm to 1600 mm, 1600 mm to 1700 mm, 1700 mm to 1800 mm, 1800 mm to 1900 mm, and 1900 mm to 2000 mm, or other values ​​in the range of 1500 mm to 2000 mm, and the embodiments of the present invention are not limited thereto.

[0068] Therefore, the size of the mask sheet in the first direction can be made large enough, and the number of vapor deposition areas located in the mask opening can be increased, so as to maximize the utilization rate of the mask frame.

[0069] For example, Figure 5As shown, the plurality of vapor deposition regions 210 of the mask sheet 200 are sequentially spaced apart in the mask opening 110, and the ratio between the sum of the dimensions of the plurality of vapor deposition regions 210 of the mask sheet 200 in the first direction X and the dimension M1 of the mask opening 110 in the first direction X is greater than 0.5 and less than 1. For example, the sum of the dimensions of the plurality of vapor deposition regions 210 of the mask sheet 200 in the first direction X may be 800 mm to 1500 mm, such as at least one of 800 mm to 900 mm, 900 mm to 1000 mm, 1000 mm to 1100 mm, 1100 mm to 1200 mm, 1200 mm to 1300 mm, 1300 mm to 1400 mm, and 1400 mm to 1500 mm, or other values ​​within the range of 800 mm to 1500 mm, which is not limited in the embodiments of the present invention.

[0070] With such an arrangement, the arrangement density of the plurality of vapor deposition regions of the mask sheet in the first direction can be increased as much as possible, which is beneficial to increasing the number of vapor deposition regions located in the mask opening, thereby improving the utilization rate of the mask frame.

[0071] For example, Figure 5 As shown, the ratio between the dimension H2 of the mask 200 in the second direction Y and the dimension M2 of the mask opening 110 in the second direction Y is greater than 0.05 and less than 0.6. For example, the dimension H2 of the mask 200 in the second direction Y can be 50 mm to 500 mm, such as at least one of 50 mm to 100 mm, 100 mm to 200 mm, 200 mm to 300 mm, 300 mm to 400 mm, and 400 mm to 500 mm, or other values ​​within the range of 50 mm to 500 mm, and the embodiments of the present invention are not limited thereto.

[0072] Such an arrangement is beneficial to increasing the number of mask sheets arranged in the second direction, thereby facilitating an increase in the total number of vapor deposition areas located in the mask openings.

[0073] Figure 7 A schematic diagram of another mask assembly provided for at least one embodiment of the present invention.

[0074] For example, compared to Figure 5 The mask assembly shown, Figure 7 The difference between the mask components in FIG. 1 is the structure of the mask sheet, and the remaining structures (eg, the mask frame) are the same and will not be described in detail here.

[0075] For example, Figure 7As shown, the deposition area 210 has a larger size in the second direction Y. For example, the size of the mask 200 in the second direction Y is 270 mm. For example, the deposition area 210 in the second direction Y is 263 mm and is used to manufacture a 21-inch display panel.

[0076] For example, compared to Figure 2 The layout shown is Figure 7 In the mask assembly shown, the plurality of evaporation regions 210 in the mask sheet 200 are sequentially spaced apart in the first direction X, thereby increasing the total number of evaporation regions in the mask opening 110, for example, making it larger than the number shown in FIG. Figure 2 The total number of mask sheets located in the mask opening when the multiple mask sheets are arranged in sequence along the first direction can improve the utilization rate of the mask frame, thereby facilitating the improvement of production capacity and product yield.

[0077] For example, for Figure 5 For the display panel shown, when the size of the binding area in the first direction X is 6.5 mm, the number of mask sheets in the corresponding mask assembly is 18, and the utilization rate of the mask frame is about 80%; when the size of the binding area in the first direction X is 4 mm, the number of mask sheets in the corresponding mask assembly is 18, and the utilization rate of the mask frame is about 84% (about 80% increase). For example, for Figure 7 For the display panel shown, when the size of the binding area in the first direction X is 6.5 mm, the number of mask sheets in the corresponding mask assembly is 16, and the utilization rate of the mask frame is approximately 83%; when the size of the binding area in the first direction X is 4 mm, the number of mask sheets in the corresponding mask assembly is 16, and the utilization rate of the mask frame is approximately 86% (approximately increased by 33%).

[0078] It can be seen that the layout method in the mask assembly provided by the embodiment of the present invention can effectively increase the layout number of mask sheets and significantly improve the utilization rate of the mask frame.

[0079] Figure 8 A schematic diagram of yet another mask assembly provided for at least one embodiment of the present invention.

[0080] For example, Figure 8 As shown, the mask sheet 200 includes fixing portions 230 located at both ends of the mask sheet 200, and the fixing portions 230 are fixed to the frame portion 120 of the mask frame 100. For example, the fixing portions 230 of the mask sheet 200 can be the portion of the mask sheet 200 located outside the mask opening 110. The fixing portions 230 of the mask sheet 200 can cooperate with and be fixed to the frame portion 120 of the mask frame 100. It should be noted that Figure 8The matching relationship between the components is only shown schematically and does not represent their actual dimensions. The specific dimensions can be set according to actual design requirements.

[0081] For example, Figure 8 As shown, the fixing portion 230 includes a clamping area 2310, which includes a main body 2301 and a plurality of protrusions 2302. The plurality of protrusions 2302 are located on a side of the main body 2301 away from the mask opening 110 and are connected to the main body 2301. For example, the plurality of protrusions 2302 and the main body 2301 can be an integral structure. The plurality of protrusions 2302 are arranged in sequence along the second direction Y, and the number of the plurality of protrusions 2302 in the clamping area 2310 is greater than 3. For example, the number of protrusions 2302 can be 2 to 8, such as 2 to 4, 3 to 5, 4 to 6, or 5 to 8, although this is not limited in the embodiments of the present invention. For example, when the mask sheet is placed on the mask frame, it can be clamped to the plurality of protrusions using a clamping device.

[0082] With such an arrangement, the tensile stress of the mask sheet can be increased by the multiple protrusions in the clamping area to reduce the sagging of the mask sheet. For example, the shrinkage of the mask sheet in the second direction can be reduced, which is beneficial to ensure that the product formed using the mask sheet meets the target size.

[0083] For example, Figure 8 As shown, the fixing portion 230 further includes a transition region 2320, which is located on a side of the main portion 2301 away from the protruding portion 2302. For example, the provision of the transition region 2320 can balance the stress between the clamping region 2310 and the portion of the mask 200 located in the mask opening 110, thereby further reducing the deformation of the mask.

[0084] Figure 9 A schematic diagram of yet another mask assembly provided for at least one embodiment of the present invention.

[0085] For example, Figure 9 As shown, the clamping region 2310 of the mask assembly includes a main portion 2301 and a plurality of protrusions 2302. The plurality of protrusions 2302 are located on a side of the main portion 2301 away from the mask opening 110. The protrusions 2302 are larger in the first direction X than the main portion 2301 in the first direction X, and the number of protrusions 2302 in the clamping region 2310 is 6. For example, the evaporation region 210 of the mask sheet 200 includes a plurality of evaporation openings 2101, which are configured to form a material layer for sub-pixels in a display panel.

[0086] By making the size of the protrusion in the first direction larger than the size of the main body, and the protrusion being directly connected to the portion of the mask sheet located in the mask opening through the main body, the stress of the mask sheet can be directly balanced through multiple protrusions. In addition, since the number of protrusions is large, the protrusions at different positions can further enhance their ability to balance the corresponding forces during the clamping process, and reduce the risk of deformation of the mask sheet such as shrinkage in the second direction.

[0087] Figure 10 A schematic diagram of mechanical simulation results of a mask assembly provided in at least one embodiment of the present utility model.

[0088] For example, Figure 10 As shown, the clamping area of ​​this mask assembly includes four protrusions. The stress in the central region of the mask sheet, located at the mask opening, is higher, while the stress gradually decreases from the central region toward the edge. Under this scheme, the droop force in this central region is relatively low, approximately 1N. This shows that increasing the number of protrusions in the clamping area helps to even out the stress distribution of the mask sheet, thereby reducing droop. For example, the area where the mask opening is located can serve as the effective area of ​​the mask frame.

[0089] It can be seen from this that the number of protrusions in the clamping area of ​​the mask provided by the embodiment of the present invention is greater than 3, for example, 3 to 8, so that the sagging of the mask can be reduced while balancing the stress distribution.

[0090] about Figure 10 For the structure of the mask assembly, please refer to the above embodiment. Figure 8 The relevant description is not repeated here.

[0091] Figure 11 A schematic diagram of a mask.

[0092] like Figure 11 As shown, after the mask is stretched, the first edge 210-1 and the second edge 210-2 of the evaporation region of the mask extending along the first direction X may shrink inward. For example, the first edge 210-1 may change to the third edge 210-3, and the second edge 210-2 may change to the fourth edge 210-4. In this case, in the display panel formed by the mask, some sub-pixels (for example, the sub-pixels located in the middle in the first direction X) have a smaller spacing in the second direction Y, while the multiple sub-pixels near the protrusion 2302 of the mask 200 have a larger spacing in the second direction Y, thereby affecting the display uniformity of the display panel.

[0093] Figure 12 A schematic diagram of yet another mask assembly provided for at least one embodiment of the present invention. Figure 13 Based on Figure 12 Schematic diagram of the distribution of multiple sub-pixels in a display panel formed by the mask assembly.

[0094] For example, Figure 12 As shown, in the mask assembly, the mask sheet 200 extends along the first direction X and includes two evaporation regions 210 spaced apart along the first direction X. For example, each evaporation region 210 corresponds to a display panel. Figure 12 A region B located in the middle of the evaporation region 210 , and regions A and C located at two ends of the evaporation region 210 in the first direction X are also schematically shown.

[0095] For example, Figure 12 and Figure 13 As shown, after the mask sheet 200 is set up, the regions A, B, and C in the evaporation region 210 have different degrees of indentation. For example, the edge portion of the evaporation region 210 corresponding to region A and the edge portion corresponding to region C are both closer to the target curve, while the edge portion of the evaporation region 210 corresponding to region B is moving away from the target curve in a direction away from the center of the evaporation region 210. For example, a shadow region S is defined between the edge of the evaporation region 210 and the target curve, and the portions of the shadow region S corresponding to regions A, B, and C have different sizes in the second direction Y. For example, the portions of the shadow region S corresponding to regions A and C in the second direction Y are smaller than the portion corresponding to region B in the second direction Y.

[0096] For example, Figure 13 As shown, in area B, the spacing between adjacent sub-pixels located in the same row in the second direction Y is unevenly distributed. For example, the spacing between adjacent sub-pixels located in the middle is smaller, and the spacing between adjacent sub-pixels near the edge is larger, which may affect the display uniformity of the display panel.

[0097] Figure 14 A schematic diagram of the partial structure of a mask provided in at least one embodiment of the present utility model.

[0098] For example, Figure 14 As shown, in the second direction Y, the dimension P1 of the vapor deposition region 210 of the mask sheet 200 corresponding to the middle portion of the mask sheet 200 in the first direction X is larger than the average dimension of the vapor deposition region 210. For example, the first edge 210-1 and the second edge 210-2 of the vapor deposition region 210 are both protruding in a direction away from the center line C extending along the first direction X, thereby making the dimension P1 of the middle portion of the vapor deposition region 210 larger.

[0099] With such a configuration, when the mask sheet shrinks after being stretched, the deformation of the first edge and the second edge of the vapor deposition area can be compensated. For example, the first edge and the second edge can be extended as much as possible along the first direction after deformation to be closer to the target position, so that adjacent sub-pixels in the display panel formed by the mask sheet can maintain a uniform distance in the second direction, which is beneficial to improving display uniformity.

[0100] Figure 15 A schematic diagram of the compensation effect of a mask provided in at least one embodiment of the present utility model.

[0101] For example, Figure 15 As shown, before the mask shrinks, the first edge 210-1 and the second edge 210-2 of the deposition area 210 can serve as the compensation curve. After the mask shrinks after being stretched, the first edge 210-1 moves to the third edge 210-3, and the second edge 210-2 moves to the fourth edge 210-4. For example, the third edge 210-3 and the fourth edge 210-4 can substantially coincide with the target position, serving as the target curve.

[0102] It can be seen from this that by making the middle portion of the evaporation region larger, it is beneficial to compensate for the deformation of the evaporation region of the mask sheet, so that the evaporation region obtained after the final deformation is more in line with the design target.

[0103] In some embodiments of the present invention, depending on the position of the evaporation area in the mask sheet, the part of the evaporation area other than the middle part in the first direction can also have a larger size in the second direction, so as to compensate for the deformation at different positions of the evaporation area in a targeted manner. The embodiments of the present invention are not limited to this.

[0104] Figure 16 A schematic diagram of a mask provided for at least one embodiment of the present utility model; Figure 17 A schematic diagram of yet another mask assembly provided for at least one embodiment of the present invention.

[0105] For example, Figure 16 As shown, the multiple deposition areas 210 of the mask sheet 200 are sequentially spaced apart in a first direction X. The separator 220 of the mask sheet 200 includes a first support portion 2201 located between adjacent deposition areas 210. The provision of the first support portion can reduce the sagging of the mask sheet and enhance the strength of the mask sheet, thereby facilitating that the size of the deposition areas better meets design requirements.

[0106] For example, Figure 17As shown, the mask frame 100 includes a plurality of mask openings 110, and the mask assembly further includes at least one second support part 2202, and the second support part 2202 is located between adjacent mask openings 110, and at least part of the first support part 2201 overlaps at least part of the second support part 2202. For example, the frame part 120 of the mask frame 100 includes a part in the same extension direction as the second support part 2202, and the second support part 2202 can be lapped on the part of the frame part 120, and the first support part 2201 of the mask sheet 200 is located on the side of the second support part 2202 away from the frame part 120. That is, the first support part 2201, the second support part 2202 of the mask sheet 200 and the mask frame 100 are sequentially stacked.

[0107] By arranging the second support part between the first support part and the mask frame, the support force of the mask sheet can be further provided, so as to further reduce the sag amount of the mask sheet.

[0108] In some embodiments, referring to Figure 17 , the second support part 2202 can be a part of the frame part 120, and the extension direction of the first support part 2201 and the extension direction of the second support part 2202 are the same, and the second support part 2202 can provide stable support force for the first support part 2201, so as to facilitate reducing the sag amount of the mask sheet 200.

[0109] For example, as Figure 17 shown, the mask assembly can include a plurality of second support parts 2202. For example, there is one second support part 2202 between adjacent evaporation areas 210. For example, the first support part 2201 located between adjacent evaporation areas 210 has a first size N1 in the direction perpendicular to the extension direction thereof, and the second support part 2202 overlapping the first support part 2201 and having the same extension direction has a second size N2, and the second size N2 is less than the first size N1.

[0110] In this way, the influence of the second support part on the area of the evaporation area of the mask sheet can be reduced, so as to facilitate improving the utilization rate of the mask frame.

[0111] At least one embodiment of the utility model further provides a display panel, at least part structure of the display panel adopts the mask assembly provided by any embodiment of the utility model, so that the display panel includes the corresponding technical effect of the mask assembly described in any of the above embodiments.

[0112] For example, referring to Figure 12 , at least one film layer of the display panel, for example, at least one film layer in the light-emitting functional layer can be made according to the mask assembly.

[0113] For example, referring to Figure 12 and Figure 13 The display panel has a size in the first direction X that is greater than a size in the second direction Y. The display panel includes a plurality of sub-pixels, and in the second direction Y, a pitch between adjacent sub-pixels is not equal. For example, referring to Figure 11 In an actual process, the evaporation area of the mask 200 can be retracted to different degrees, and after compensation by the mask 200 (for example, please refer to Figure 14 ) provided in the embodiments of the present application, the size of the evaporation area can be close to the target size, but inevitably has a certain deviation from the target size under the condition of meeting the process design requirements, so that the pitch of the plurality of sub-pixels in the display panel formed by the evaporation area is non-uniform. For example, in the plurality of display panels formed by the mask assembly, the pitch of the adjacent sub-pixels in at least one display panel is not equal in the second direction Y, and the embodiments of the present application are not limited thereto.

[0114] The mask sheet provided in the embodiments of the present application adopts the compensation structure (please refer to Figure 14 ), so that the pitch of the plurality of sub-pixels in the display panel formed is effectively improved and has good uniformity, so as to facilitate improving the quality of the display picture.

[0115] The display device provided in at least one embodiment of the present application includes the display panel (for example, the display panel described in the above embodiments) provided in the embodiments of the present application. Therefore, the technical effects of the display panel described above can also be embodied on the display device, which will not be described here.

[0116] For example, the display device can be a display device such as an organic light-emitting diode display device, and any product or component having a display function such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a notebook computer, a navigator, etc., and the embodiments of the present application are not limited thereto.

[0117] The following points need to be explained:

[0118] (1) In the drawings of the embodiments of the present application, only the structures involved in the embodiments of the present application are involved, and other structures can be referred to the general design.

[0119] (2) In the case of no conflict, the features in the same embodiment and different embodiments of the present application can be combined with each other.

[0120] The above description is only a demonstrative embodiment of the present application, and is not used to limit the protection scope of the present application, and the protection scope of the present application is determined by the appended claims.

Claims

1. A mask assembly, characterized in that: include: A mask frame, comprising at least one mask opening and a frame portion surrounding the mask opening; as well as A plurality of mask sheets are overlapped on the mask frame; Each of the mask sheets includes a plurality of evaporation regions and a partition surrounding the plurality of evaporation regions, and the plurality of evaporation regions of the mask sheet overlap with the mask opening. The mask opening extends along a first direction, a size of the mask opening in the first direction is larger than a size in a second direction, and the first direction intersects the second direction. The mask sheet extends along the first direction, and a size of each of the vapor deposition regions in the first direction is larger than a size of the vapor deposition region in the second direction.

2. The mask assembly according to claim 1, wherein: The sum of sizes of the plurality of vapor deposition regions located in the mask opening in the first direction is greater than the sum of sizes of the plurality of vapor deposition regions located in the mask opening in the second direction.

3. The mask assembly according to claim 1, wherein: The minimum distance between the evaporation region of the mask sheet and the edge of the mask opening is no greater than the distance between adjacent evaporation regions.

4. The mask assembly according to claim 3, wherein: The minimum distance between the evaporation area of ​​the mask sheet and the edge of the mask opening in the first direction is 15 mm to 20 mm, and the minimum distance between the evaporation area of ​​the mask sheet and the edge of the mask opening in the second direction is 30 mm.

5. The mask assembly according to claim 1, wherein: The size of the mask opening in the first direction is 1400 mm to 1600 mm, and the size of the mask opening in the second direction is 800 mm to 1000 mm.

6. The mask assembly according to any one of claims 1 to 5, characterized in that: A ratio of a size of the mask sheet in the first direction to a size of the mask opening in the first direction is greater than 1 and less than 1.

5.

7. The mask assembly according to any one of claims 1 to 5, characterized in that: The multiple evaporation regions of the mask sheet are arranged in sequence in the mask opening, and the ratio of the sum of the sizes of the multiple evaporation regions of the mask sheet in the first direction to the size of the mask opening in the first direction is greater than 0.5 and less than 1.

8. The mask assembly according to any one of claims 1 to 5, characterized in that: A ratio between a size of the mask sheet in the second direction and a size of the mask opening in the second direction is greater than 0.05 and less than 0.

6.

9. The mask assembly according to any one of claims 1 to 5, characterized in that: The mask sheet includes fixing portions located at both ends of the mask sheet, and the fixing portions are fixed to the frame portion of the mask frame. In which, the fixing portion includes a clamping area, the clamping area includes a main body and a plurality of protrusions, the plurality of protrusions are located on a side of the main body away from the mask opening, and the protrusions are connected to the main body, the plurality of protrusions are arranged in sequence along the second direction, and the number of the plurality of protrusions in the clamping area is greater than 3.

10. The mask assembly according to claim 9, wherein: The number of the plurality of protrusions in the clamping area is 3 to 8.

11. The mask assembly according to any one of claims 1 to 5, characterized in that: In the second direction, a size of the vapor deposition area of ​​the mask sheet corresponding to a middle portion of the mask sheet in the first direction is larger than an average size of the vapor deposition area.

12. The mask assembly according to any one of claims 1 to 5, characterized in that: The plurality of vapor deposition areas of the mask sheet are sequentially spaced apart in the first direction, and the partitioning portion of the mask sheet includes a first supporting portion located between adjacent vapor deposition areas. The mask frame includes a plurality of mask openings, and the mask assembly further includes at least one second supporting portion, the second supporting portion is located between adjacent mask openings, and at least a portion of the first supporting portion overlaps with at least a portion of the second supporting portion.

13. The mask assembly according to claim 12, wherein: The first supporting portion, the second supporting portion, and the mask frame of the mask sheet are stacked in sequence.

14. A display panel, characterized in that: At least a portion of the structure of the display panel is manufactured using the mask assembly according to any one of claims 1-13.

15. The display panel according to claim 14, wherein: The display panel has a larger size in the first direction than in the second direction. The display panel includes a plurality of sub-pixels. In the second direction, intervals between adjacent sub-pixels are unequal.

16. A display device, characterized in that: Includes the display panel according to claim 14 or 15.

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