Light source assembly and 3D printing equipment

Abstract

The utility model provides a light source assembly and 3D printing equipment, and relates to the technical field of 3D printing. The light source assembly is applied to the 3D printing equipment and comprises at least one light-emitting part, the light-emitting part comprises at least two light-emitting rows, the at least two light-emitting rows are arranged in the first direction, every two adjacent light-emitting rows are not located on the same straight line, and the first direction is perpendicular to the moving direction of the light source assembly during printing. According to the embodiment of the invention, the two adjacent light-emitting rows in the light-emitting part are arranged in a staggered manner instead of splicing to obtain a long linear light source, so that the problem of poor printing effect caused by the fact that a splicing gap cannot meet the splicing precision requirement is avoided, the limitation on the edge size between the single light-emitting rows is reduced, and the printing fineness is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of 3D printing, and in particular to a light source assembly and a 3D printing device. BACKGROUND

[0002] At present, the light source manufactured by a chip, for example, a micro LED linear light source, is limited by the size of a wafer and cannot be very long in length, so multiple chips need to be spliced into a long linear light source, for example, as shown in Figure 1 The pixel size for light-cured 3D printing is between 5-100um, and the splicing accuracy required is very high. When multiple chips are spliced, physical interference occurs between two adjacent chips, so that the splicing gap in the linear light source obtained by splicing, that is, the edge size of each chip, cannot meet the splicing accuracy requirement, which will result in poor printing effect around the splicing position. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the present application provides a light source assembly and a 3D printing device, which solve the problem of poor printing effect around the splicing position caused by the splicing gap when multiple chips are spliced in the related art.

[0004] In a first aspect, an embodiment of the present application provides a light source assembly applied to a 3D printing device, and the light source assembly comprises:

[0005] at least one light emitting piece; the light emitting piece comprises:

[0006] at least two light emitting rows, the at least two light emitting rows are arranged along a first direction, and adjacent two light emitting rows are not on the same straight line, and the first direction is perpendicular to the moving direction of the light source assembly during printing.

[0007] In a second aspect, an embodiment of the present application provides a 3D printing device, which comprises the light source assembly of the first aspect.

[0008] In the embodiment of the present application, the light source assembly comprises at least one light emitting piece, and each light emitting piece comprises at least two light emitting rows. For any light emitting piece, the at least two light emitting rows are arranged along a first direction, and adjacent two light emitting rows are not on the same straight line, that is, adjacent two light emitting rows are staggered in the first direction. In the embodiment of the present application, two adjacent light emitting rows in the light emitting piece are staggered instead of being spliced to obtain a long linear light source, thereby avoiding the problem of poor printing effect caused by the fact that the splicing gap cannot meet the splicing accuracy requirement, reducing the limitation on the edge size between single light emitting rows, and improving the printing fineness.

[0009] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clearly understood and implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0010] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0011] Figure 1 A structural schematic diagram of a long linear light source in the related art is shown;

[0012] Figure 2 One of the schematic diagrams showing that the adjacent two light emitting rows of the embodiment of the present application have no overlap in the first direction is shown;

[0013] Figure 3 A schematic diagram showing that the adjacent two light emitting rows of the embodiment of the present application have no overlap in the first direction is shown Figure 2 ;

[0014] Figure 4 One of the schematic diagrams showing that the adjacent two light emitting rows of the embodiment of the present application have partial overlap in the first direction is shown;

[0015] Figure 5 Two of the schematic diagrams showing that the adjacent two light emitting rows of the embodiment of the present application have partial overlap in the first direction are shown;

[0016] Figure 6 One of the schematic diagrams showing that the light source assembly of the embodiment of the present application includes at least two light emitting pieces is shown;

[0017] Figure 7 Two of the schematic diagrams showing that the light source assembly of the embodiment of the present application includes at least two light emitting pieces are shown;

[0018] Figure 8 Three of the schematic diagrams showing that the light source assembly of the embodiment of the present application includes at least two light emitting pieces are shown;

[0019] Figure 9 Four of the schematic diagrams showing that the light source assembly of the embodiment of the present application includes at least two light emitting pieces are shown;

[0020] Figure 10 One of the schematic diagrams showing that the light emitting rows included in the light emitting pieces corresponding to the positions in different light emitting pieces of the embodiment of the present application are arranged in alignment is shown;

[0021] Figure 11Fig. 2 shows a schematic view of the alignment of the light emitting units included in the light emitting rows corresponding to the positions in different light emitting pieces according to an embodiment of the present application;

[0022] Figure 12 Fig. 3 shows a schematic view of the partially overlapped projection in the first direction of the light emitting units included in the light emitting rows corresponding to the positions in different light emitting pieces according to an embodiment of the present application;

[0023] Figure 13 Fig. 4 shows a schematic view of the partially overlapped projection in the first direction of the light emitting units included in the light emitting rows corresponding to the positions in different light emitting pieces according to an embodiment of the present application;

[0024] Figure 14 Fig. 5 shows a schematic view of the partially overlapped projection in the first direction of the light emitting units included in the light emitting rows corresponding to the positions in different light emitting pieces according to an embodiment of the present application;

[0025] Figure 15 Fig. 6 shows a schematic view of the exposure control method according to an embodiment of the present application;

[0026] Figure 16 Fig. 7 shows a schematic view of the complete overlapped light emitting units and the incomplete overlapped light emitting units according to an embodiment of the present application;

[0027] Figure 17 Fig. 8 shows a schematic view of the manufacturing method of the light source assembly according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly described below with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0029] The terms “first”, “second”, etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by “first”, “second”, etc. are generally of a kind and do not limit the number of objects, for example, the first object can be one or more. In addition, “and / or” in the specification and claims means at least one of the connected objects, and the character “ / ” generally represents an “or” relationship between the associated objects before and after.

[0030] The light source components and related devices and methods provided in this application will be described below with reference to the accompanying drawings, through specific embodiments and application scenarios. In particular, the light source components, exposure control methods, 3D printing equipment, readable storage media, and manufacturing methods of the light source components will be described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0031] This application provides a light source assembly for use in a 3D printing device, the light source assembly comprising:

[0032] At least one light-emitting element; the light-emitting element includes:

[0033] At least two light-emitting rows are arranged along a first direction, and adjacent light-emitting rows are not on the same straight line. The first direction is perpendicular to the direction of movement of the light source assembly during printing.

[0034] In this embodiment, the light source assembly includes at least one light-emitting element, and each light-emitting element includes at least two light-emitting rows, which are also chips, and can be micro LED chips. For any light-emitting element, at least two light-emitting rows are arranged along a first direction, and adjacent light-emitting rows are not on the same straight line, that is, adjacent light-emitting rows are staggered in the first direction. The first direction is perpendicular to the direction of movement of the light source assembly during printing. If the direction of movement of the light source assembly during printing is the y-direction, then the first direction is the x-direction. The y-direction and the x-direction are perpendicular.

[0035] For example, such as Figure 2 and Figure 3 As shown, for any light-emitting element 100, there are light-emitting rows 101, 102, 103 and 104 arranged along the first direction. Among the light-emitting rows 101, 102, 103 and 104, two adjacent light-emitting rows are not on the same straight line.

[0036] During printing, the system reads the data corresponding to the target area to be cured for each illuminated row and controls the illumination of the illuminated row to achieve precise curing. For example, if illuminated rows 101 and 103 are pixels 0-99 and 200-299 respectively, then the corresponding data for pixels 0-99 is read into illuminated row 101, and the corresponding data for pixels 200-299 is read into illuminated row 103, thus achieving printing.

[0037] In this embodiment, two adjacent light-emitting rows in the light-emitting element are staggered instead of being spliced ​​together to obtain a long linear light source. This avoids the problem of poor printing effect caused by the splicing gap not meeting the splicing accuracy requirements, reduces the limitation on the edge size between individual light-emitting rows, and improves the printing precision.

[0038] In an embodiment of the present application, each light emitting row includes at least one light emitting unit, such as one, two, or more than two light emitting units.

[0039] The number of light emitting units included in different light emitting rows in a light emitting piece can be the same or different.

[0040] In this embodiment, each light emitting row includes at least two light emitting units, and in an embodiment, the number of light emitting units included in a light emitting row can be between 10 and 2000.

[0041] For the convenience of print control and light source assembly manufacturing, the number of light emitting units included in different light emitting rows in a light emitting piece can be the same. Of course, in order to cope with actual printing scenarios, the number of light emitting units included in different light emitting rows in a light emitting piece can also be different. The number of light emitting units in different light emitting rows can be set according to actual printing needs.

[0042] In an embodiment of the present application, the number of light emitting rows is n, and when n is greater than or equal to 3,

[0043] The n light emitting rows are arranged in front of and behind each other in the moving direction of the light source assembly; or,

[0044] The n light emitting rows are arranged in a stepped manner in the moving direction of the light source assembly.

[0045] In this embodiment, when the number of light emitting rows in a light emitting piece is n, and n is greater than or equal to 3, the n light emitting rows can be arranged in front of and behind each other in the moving direction of the light source assembly, as shown in detail in Figure 2 , or can be arranged in a stepped manner, as shown in detail in Figure 3 .

[0046] In the embodiments of the present application, the plurality of light emitting rows included in a light emitting piece can have a variety of arrangement modes, which have high flexibility to meet the needs of different printing scenarios. The n light emitting rows arranged in front of and behind each other in the moving direction of the light source assembly can reduce the overall space occupied by the light source assembly and improve the space utilization.

[0047] In an embodiment of the present application, the projections of two adjacent light emitting rows in the first direction do not overlap; or, the projections of two adjacent light emitting rows in the first direction partially overlap.

[0048] In an embodiment, the projections of two adjacent light emitting rows in the first direction do not overlap, that is, two adjacent light emitting rows do not have a shift in the moving direction of the light source assembly, and the end of the former light emitting row and the beginning of the latter light emitting row do not have a shift in the moving direction. Exemplarily, as shown in Figure 2 and Figure 3As shown in FIG. 1, the projection of the light-emitting row 101 in the first direction does not overlap with the projection of the light-emitting row 102 in the first direction, the projection of the light-emitting row 102 in the first direction does not overlap with the projection of the light-emitting row 103 in the first direction, and the projection of the light-emitting row 103 in the first direction does not overlap with the projection of the light-emitting row 104 in the first direction. By this arrangement, the overlapping light-emitting units can be avoided to cause overexposure, and the light emitted by the light-emitting member is more uniform.

[0049] In another embodiment, in order to avoid the problem of missing light-emitting between adjacent light-emitting rows, the projections of two adjacent light-emitting rows in the first direction are partially overlapped, that is, the projections of two adjacent light-emitting rows in the first direction are partially overlapped. Exemplarily, as shown in FIG. 2, the projection of the light-emitting row 101 in the first direction partially overlaps with the projection of the light-emitting row 102 in the first direction, the projection of the light-emitting row 102 in the first direction partially overlaps with the projection of the light-emitting row 103 in the first direction, and the projection of the light-emitting row 103 in the first direction partially overlaps with the projection of the light-emitting row 104 in the first direction. Figure 4 and Figure 5 As shown in FIG. 1, the projection of the light-emitting row 101 in the first direction does not overlap with the projection of the light-emitting row 102 in the first direction, the projection of the light-emitting row 102 in the first direction does not overlap with the projection of the light-emitting row 103 in the first direction, and the projection of the light-emitting row 103 in the first direction does not overlap with the projection of the light-emitting row 104 in the first direction. By this arrangement, the overlapping light-emitting units can be avoided to cause overexposure, and the light emitted by the light-emitting member is more uniform.

[0050] In one embodiment of the present application, when the projections of two adjacent light-emitting rows in the first direction are partially overlapped, the overlapped amount of the projections of the two adjacent light-emitting rows in the first direction is a preset number of light-emitting units, and the preset number is greater than 0 and less than 2.

[0051] In this embodiment, the overlapped amount of the projections of two adjacent light-emitting rows in the first direction is a preset number of light-emitting units, and the overlapped amount can be controlled to be less than 2 light-emitting units, for example, the two adjacent light-emitting rows in the first direction are overlapped by 0.2, 0.5, 1, 1.3 or 1.5 light-emitting units, etc. By setting a more appropriate overlapped amount of the two adjacent light-emitting rows in the first direction, it can be avoided that the overlapped amount is too large to cause a large area of overexposure, and it can be avoided that the overlapped amount is too small to cause a large area of missing light-emitting, thereby ensuring the exposure quality.

[0052] Optionally, each light-emitting row includes one light-emitting unit, and the projections of two adjacent light-emitting rows in the first direction are partially overlapped, and the overlapped amount of the projections is greater than 0 and less than 1. As can be referred to Figure 14 In the light source assembly, the light-emitting member includes a plurality of light-emitting rows, each light-emitting row includes one light-emitting unit, and the projections of two adjacent light-emitting rows in the first direction are partially overlapped, and the overlapped amount of the projections is greater than 0 and less than 1. The structure of the light-emitting unit of the present application can appropriately enlarge the spacing of the light-emitting units, and the projections of other light-emitting units in another row are partially overlapped, so that the resolution is not reduced or improved under the condition of ensuring the process implementation. When the process is improved and the current required resolution can be achieved in the future, the resolution can be further improved through this structure.

[0053] In an embodiment of the present application, when the number of the at least one light emitting member is greater than or equal to 2, the at least two light emitting members are arranged along the moving direction of the light source assembly.

[0054] In this embodiment, the light source assembly can include 2 or more light emitting members, each of which includes at least two light emitting rows, for example, as shown in Figures 6 to 9 The light source assembly can include 2 light emitting members, a first light emitting member 200 and a second light emitting member 300.

[0055] One light source assembly includes at least two light emitting members, which can control both light emitting members to emit light at the same time during the scanning process, so as to realize exposure of a larger area and improve the exposure efficiency.

[0056] In addition, the at least two light emitting members can realize at least two exposures of the same area of the to-be-cured area during the scanning process, that is, longer time exposure, so as to meet the energy required for curing, for example, the first light emitting member 200 performs the first exposure and the second light emitting member 300 performs the second exposure for one area, thereby improving the exposure effect. In particular, at least two exposures are performed for the edge position of the to-be-cured area, so as to ensure the exposure effect of the edge position.

[0057] In an embodiment of the present application, the distance between the two adjacent light emitting members is greater than 20 microns and less than 5 millimeters.

[0058] In the same light emitting member, the distance between the two adjacent light emitting rows in the moving direction of the light source assembly is greater than 20 microns and less than 5 millimeters.

[0059] In this embodiment, the light source assembly includes at least two light emitting members, and the distance between each adjacent light emitting member is equal; in the same light emitting member, the distance between each adjacent light emitting row is equal.

[0060] The distance between the two adjacent light emitting members is greater than 20 microns and less than 5 millimeters, and in the same light emitting member, the distance between the two adjacent light emitting rows in the moving direction of the light source assembly is greater than 20 microns and less than 5 millimeters. Through this setting mode, the light emitting members in the light source assembly are more compact, and the volume of the light source assembly is smaller. There is no light deficiency area between the light emitting members.

[0061] In an embodiment of the present application, for any first light emitting row in the first light emitting member and the second light emitting row adjacent to the first light emitting row, and the third light emitting row in the second light emitting member adjacent to the first light emitting member and corresponding to the position of the first light emitting row in the moving direction, the second light emitting row and the third light emitting row are on the same straight line.

[0062] For any first light emitting row in the first light emitting piece and a second light emitting row adjacent to the first light emitting row, and a fourth light emitting row in the second light emitting piece adjacent to the first light emitting piece, corresponding to the second light emitting row in the moving direction, the first light emitting row and the fourth light emitting row are on the same straight line.

[0063] In this embodiment, as shown in Figures 6 to 9 , the light source assembly includes a first light emitting piece 200 and a second light emitting piece 300 adjacent to the first light emitting piece 200.

[0064] In one case, as shown in Figure 6 and Figure 7 , the first light emitting piece 200 includes a first light emitting row 201 and a second light emitting row 202 adjacent thereto, and the second light emitting piece 300 includes a third light emitting row 301, which corresponds to the first light emitting row 201 in the moving direction of the light source assembly, for example, the first light emitting row 201 is the first light emitting row of the first light emitting piece 200, and the third light emitting row 301 is the first light emitting row of the second light emitting piece 300.

[0065] For the positional relationship between the second light emitting row 202 and the third light emitting row 301, the second light emitting row 202 and the third light emitting row 301 are defined to be on the same straight line.

[0066] In another case, as shown in Figure 8 and Figure 9 , the first light emitting piece 200 includes a first light emitting row 201 and a second light emitting row 202 adjacent thereto, and the second light emitting piece 300 includes a fourth light emitting row 302, which corresponds to the second light emitting row 202 in the moving direction of the light source assembly, for example, the second light emitting row 202 is the second light emitting row of the first light emitting piece 200, and the fourth light emitting row 302 is the second light emitting row of the second light emitting piece 300.

[0067] For the positional relationship between the first light emitting row 201 and the fourth light emitting row 302, the first light emitting row 201 and the fourth light emitting row 302 are defined to be on the same straight line.

[0068] It should be noted that in the related art, multiple chips of a light emitting piece are spliced to form a long linear light source, and there is a physical interference between adjacent chips, resulting in a splicing gap. In the embodiments of the present application, the light emitting rows of different light emitting pieces in the first direction are on the same straight line, "on the same straight line" means alignment in the first direction, which is not equivalent to "splicing" of the front and rear two light emitting rows. In the figure, only an example on the same straight line is shown.

[0069] In the embodiments of the present application, the light emitting rows of different light emitting members in the first direction are arranged on a straight line, so that the light emitting rows are aligned in the first direction, thereby avoiding the alignment problem of the light emitting rows.

[0070] In an embodiment of the present application, the light emitting rows corresponding in position in different light emitting members include the same or different number of light emitting units in the movement direction.

[0071] In the embodiment, the light emitting rows corresponding in position in different light emitting members in the movement direction of the light source assembly can include the same or different number of light emitting units.

[0072] For example, as shown in Figure 6 and Figure 7 , the light emitting rows corresponding in position in different light emitting members include the first light emitting row 201 and the third light emitting row 301, and the number of light emitting units of the first light emitting row 201 and the third light emitting row 301 can be the same or different. For another example, as shown in Figure 8 and Figure 9 , the light emitting rows corresponding in position in different light emitting members include the second light emitting row 202 and the fourth light emitting row 302, and the number of light emitting units of the second light emitting row 202 and the fourth light emitting row 302 can be the same or different.

[0073] In an embodiment of the present application, the light emitting rows corresponding in position in different light emitting members are arranged in alignment; or, the projection of the light emitting units included in the light emitting rows corresponding in position in different light emitting members in the first direction partially overlaps, and the overlapping amount is the same as the overlapping amount of the adjacent two light emitting rows in the movement direction in the same light emitting member.

[0074] In an embodiment, as shown in Figure 10 and Figure 11 , the light emitting units included in the light emitting rows corresponding in position in different light emitting members can be arranged in alignment. The projections of the adjacent two light emitting rows in the first direction in the same light emitting member have no overlap, the number of light emitting units included in the light emitting rows corresponding in position in different light emitting members is the same, and the light emitting units included in the light emitting rows corresponding in position in different light emitting members are arranged in alignment, Figure 10 and Figure 11 the dashed line in the above two figures is used to represent the alignment. Through at least two light emitting members, a larger area can be exposed at the same time during the scanning process, and at least two light emitting members can perform at least two exposures on the same area of the to-be-cured area during the scanning process, thereby improving the exposure effect. Moreover, the light emitting units included in the light emitting rows corresponding in position in different light emitting members are arranged in alignment, which can make the arrangement more simple.

[0075] In another embodiment, as shown in Figure 12 andFigure 13 As shown, the projection of the light-emitting units included in the light-emitting rows corresponding in position in different light-emitting pieces partially overlap in the first direction. The projection of the two adjacent light-emitting rows in the same light-emitting piece partially overlaps, the number of light-emitting units included in the light-emitting rows corresponding in position in different light-emitting pieces is the same or different, and the projection of the light-emitting units included in the light-emitting rows corresponding in position in different light-emitting pieces partially overlaps in the first direction. Through the at least two light-emitting pieces, a larger area can be exposed at the same time during the scanning process, and the at least two light-emitting pieces can perform at least two exposures on the same area of the to-be-cured area during the scanning process, thereby improving the exposure effect. Moreover, through the projection of the light-emitting units included in the light-emitting rows corresponding in position in different light-emitting pieces partially overlapping in the first direction, on the one hand, the edge light-emitting units of the second light-emitting piece are controlled to emit light during the second exposure, and the edge position of the to-be-cured area is exposed for the second time through the edge light-emitting units of the second light-emitting piece, thereby improving the exposure accuracy and ensuring the exposure effect of the edge position. On the other hand, the entire light-emitting units of the second light-emitting piece are controlled to emit light during the second exposure, so as to compensate for the gap position between the light-emitting units in the first light-emitting piece, thereby making the exposure more uniform.

[0076] The embodiment of the present application provides a 3D printing device, which comprises the light source assembly of any one of the above-mentioned embodiments and can achieve the same technical effect. To avoid repetition, details are not described herein.

[0077] The embodiment of the present application provides an exposure control method applied to a 3D printing device, wherein the 3D printing device comprises the light source assembly of any one of the above-mentioned embodiments, as shown in the above-mentioned embodiments, the method comprises the following steps. Figure 15

[0078] S1401, the light source assembly is controlled to be opposite to the to-be-cured area and to move in a scanning manner.

[0079] The light source assembly comprises at least one light-emitting piece, and each light-emitting piece comprises at least two light-emitting rows. For any light-emitting piece, the at least two light-emitting rows are arranged along a first direction, and the two adjacent light-emitting rows are not on the same straight line, that is, the two adjacent light-emitting rows are staggered in the first direction.

[0080] When printing, the light source assembly is controlled to be opposite to the to-be-cured area and to move in a scanning manner.

[0081] S1402, during the scanning movement, when the light-emitting piece of the light source assembly is opposite to a target area of the to-be-cured area, at least part of the light-emitting units in the light-emitting piece are controlled to emit light to irradiate the target area.

[0082] ​In the scanning movement, the target area corresponding to each light-emitting row is read according to the target area of the to-be-cured area corresponding to the light-emitting row, the light-emitting of the light-emitting row is controlled, and the purpose of accurate curing is achieved. It can be understood that in each light-emitting piece, the number of light-emitting units of the same light-emitting piece can be selected according to the needs.

[0083] In the embodiment of the present application, the two adjacent light-emitting rows in the light-emitting piece are staggered and arranged instead of being spliced to obtain a long linear light source, thereby avoiding the problem of poor printing effect caused by the fact that the splicing gap cannot meet the splicing accuracy requirement, reducing the limitation on the edge size between the single light-emitting rows, and improving the printing fineness.

[0084] In an embodiment of the present application, the method further comprises: when the projection of the two adjacent light-emitting rows of the light-emitting piece in the first direction is partially overlapped, controlling at least part of the light-emitting units in one of the two adjacent light-emitting rows to emit light, and at least part of the light-emitting units in the other of the two adjacent light-emitting rows not to emit light.

[0085] In this embodiment, in order to avoid light-emitting loss, the projection of the two adjacent light-emitting rows of the light-emitting piece in the first direction can be partially overlapped. However, when the projection of the two adjacent light-emitting rows in the first direction is partially overlapped, for example, as shown in Figure 4 and Figure 5 If both emit light, it is likely to cause overexposure. Therefore, when the projection of the two adjacent light-emitting rows in the first direction is partially overlapped, the light-emitting of the two adjacent light-emitting rows can be flexibly controlled.

[0086] In an embodiment, for the light source assembly in which the projection of the two adjacent light-emitting rows of the light-emitting piece in the first direction is partially overlapped, at least part of the light-emitting units in one of the two adjacent light-emitting rows can be controlled to emit light, and at least part of the light-emitting units in the other of the two adjacent light-emitting rows can be controlled not to emit light, thereby avoiding the problem of overexposure in the overlapping area.

[0087] In an embodiment of the present application, the control of at least part of the light-emitting units in one of the two adjacent light-emitting rows to emit light and at least part of the light-emitting units in the other of the two adjacent light-emitting rows not to emit light comprises:

[0088] controlling the light-emitting units in one of the two adjacent light-emitting rows to emit light, the light-emitting units in the other of the two adjacent light-emitting rows not to emit light, and the light-emitting units in the two adjacent light-emitting rows that are not completely overlapped to emit light;

[0089] wherein the light-emitting units that are completely overlapped are light-emitting units whose area within the overlapping range is greater than or equal to a first preset percentage, and the light-emitting units that are not completely overlapped are light-emitting units whose area within the overlapping range is less than the first preset percentage.

[0090] In this embodiment, the overlapping light emitting units include complete overlapping light emitting units and incomplete overlapping light emitting units. The complete overlapping light emitting unit is the light emitting unit whose area in the overlapping range is greater than or equal to the first preset percentage, that is, the complete overlapping refers to the a% projection of the light emitting unit in the first direction overlaps with the projection of another light emitting unit in the first direction, and a% is greater than or equal to the first preset percentage, such as the light emitting unit 401, the light emitting unit 501 in FIG. 4. Figure 16 The incomplete overlapping light emitting unit is the light emitting unit whose area in the overlapping range is less than the first preset percentage, that is, the incomplete overlapping refers to the b% projection of the light emitting unit in the first direction overlaps with the projection of another light emitting unit in the first direction, and b% is less than the first preset percentage, such as the light emitting unit 402, the light emitting unit 502 in FIG. 4. Figure 16 The incomplete overlapping light emitting unit is the light emitting unit whose area in the overlapping range is less than the first preset percentage, that is, the incomplete overlapping refers to the b% projection of the light emitting unit in the first direction overlaps with the projection of another light emitting unit in the first direction, and b% is less than the first preset percentage, such as the light emitting unit 402, the light emitting unit 502 in FIG. 4.

[0091] After determining whether the overlapping light emitting unit is the complete overlapping light emitting unit, for the incomplete overlapping light emitting unit, the light emitting thereof is controlled, and for the complete overlapping light emitting unit, the complete overlapping light emitting unit in one light emitting row is controlled to emit light, and the complete overlapping light emitting unit in the other light emitting row is not controlled to emit light. In this way, the problem of light emitting missing between two light emitting rows is solved, and the problem of overexposure is also avoided.

[0092] In an embodiment of the present application, the light source assembly includes at least two light emitting pieces; during the scanning movement, when the light emitting piece of the light source assembly is opposite to the target region of the region to be cured, at least part of the light emitting units in the light emitting piece are controlled to emit light to irradiate the target region, including:

[0093] At the first time during the scanning movement of the light source assembly, at least part of the light emitting units in the first light emitting piece emit light to irradiate the first target region of the region to be cured; at the second time during the scanning movement of the light source assembly, at least part of the light emitting units in the second light emitting piece emit light to irradiate the second target region of the region to be cured;

[0094] Wherein, the area of the intersection region of the first target region and the second target region is greater than zero and less than the area of the union region of the first target region and the second target region.

[0095] In this embodiment, during the scanning of the light source assembly, the region to be cured is exposed at least twice by the at least two light emitting pieces included in the light source assembly.

[0096] In the process of the scanning movement of the light source assembly, at a first time, at least part of the light emitting units in the first light emitting row are controlled to emit light to irradiate the to-be-cured region, and a region in the to-be-cured region irradiated by at least part of the light emitting units in the first light emitting row at the first time is taken as a first target region. In the process of the scanning movement of the light source assembly, at a second time, at least part of the light emitting units in the second light emitting row are controlled to emit light to irradiate the to-be-cured region, and a region in the to-be-cured region irradiated by at least part of the light emitting units in the second light emitting row at the second time is taken as a second target region. It can be understood that the light source assembly can be arranged to irradiate while moving.

[0097] The intersection region between the first target region and the second target region has an area greater than zero, that is, the region irradiated by at least part of the light emitting units in the first light emitting row at the first time and the region irradiated by at least part of the light emitting units in the second light emitting row at the second time have an intersection region, and the intersection region is exposed at least twice by at least part of the light emitting units in the first light emitting row at the first time and by at least part of the light emitting units in the second light emitting row at the second time.

[0098] The union region of the first target region and the second target region has an area greater than the intersection region between the first target region and the second target region, that is, the first target region and the second target region do not completely overlap, and there is a partially overlapping region and a partially non-overlapping region between the first target region and the second target region. It can also be understood that the first light emitting row and the second light emitting row are arranged in a non-aligned manner by overlapping in the projection in the first direction.

[0099] In the process of the scanning movement of the light source assembly, at least two light emitting rows included in the light source device expose the to-be-cured region on the screen at least twice, and the intersection region between the target regions exposed at least twice has an area greater than zero and less than the union region between the target regions exposed at least twice. In this way, flexible exposure of the to-be-cured region can be realized by the flexible union region of the two light emitting rows, the problem of insufficient printing fineness caused by the exposure size being limited by the pixel size can be solved, that is, the exposure size has more detailed fineness without changing the size of the pixel size, and the printing quality can be improved.

[0100] In an embodiment of the present application, at a first time in the process of the scanning movement of the light source assembly, at least part of the light emitting units in the first light emitting piece emit light to irradiate a first target region of the to-be-cured region, comprising:

[0101] At the first time, all the light emitting units in the first light emitting piece corresponding to the to-be-cured region are controlled to emit light to irradiate the first target region of the to-be-cured region.

[0102] At a second time instant during the scanning movement of the light source assembly, at least part of the light emitting units in the second light emitting member emit light to irradiate a second target region of the region to be solidified, comprising:

[0103] At the second time instant, all light emitting units in the second light emitting member corresponding to the region to be solidified are controlled to emit light, or light emitting units in the second light emitting member corresponding to the edge position of the region to be solidified are controlled to emit light to irradiate the second target region of the region to be solidified.

[0104] In this embodiment, at the first time instant, all light emitting units in the first light emitting member corresponding to the region to be solidified are controlled to emit light, and at the second time instant, all light emitting units in the second light emitting member corresponding to the region to be solidified are controlled to emit light, which ensures the exposure effect on the region to be solidified.

[0105] Alternatively, at the first time instant, all light emitting units in the first light emitting member corresponding to the region to be solidified are controlled to emit light, and at the second time instant, light emitting units in the second light emitting member corresponding to the edge position of the region to be solidified are controlled to emit light, which can solve the problem of insufficient exposure of the edge region.

[0106] In an embodiment of the present application, the light emitting units close to the edge position include target light emitting units at the edge position of the region to be solidified; or the light emitting units close to the edge position include target light emitting units at the edge position of the region to be solidified and light emitting units adjacent to or spaced from the target light emitting units.

[0107] In this embodiment, the light emitting units close to the edge position can be light emitting units corresponding to the edge position of the region to be solidified, for example, light emitting units exactly at the edge position of the region to be solidified. By exposing the light emitting units corresponding to the edge position of the region to be solidified, the edge region can be accurately controlled, the consistency of the edge solidification effect is ensured, and the problems of insufficient or excessive solidification of the edge are avoided.

[0108] Alternatively, the light emitting units close to the edge position can also be light emitting units corresponding to the edge position of the region to be solidified and light emitting units adjacent to the light emitting units corresponding to the edge position of the region to be solidified. The exposure of the adjacent light emitting units can make up for the insufficient exposure of the edge light emitting units. Through the superposition effect of the light emitting units at the edge position and their adjacent light emitting units, the solidification effect of the edge region is enhanced.

[0109] Alternatively, the light emitting units close to the edge position can also be the light emitting units corresponding to the edge position of the region to be cured and the light emitting units spaced from the light emitting units corresponding to the edge position of the region to be cured, compared with the exposure of the light emitting units at the edge position and the light emitting units adjacent to the light emitting units at the edge position, the light emitting units at the edge position and the spaced light emitting units can reduce the excessive superposition of light intensity in the edge region, and avoid the problem of excessive curing caused thereby.

[0110] In the embodiments of the present application, by setting the light emitting units close to the edge position of the region to be cured as different light emitting units, the flexibility and accuracy of exposure can be improved.

[0111] The embodiments of the present application also provide a 3D printing device, which comprises a processor and a memory, and the memory stores programs or instructions executable on the processor. When the programs or instructions are executed by the processor, each step of the above-mentioned exposure control method embodiments is implemented, and the same technical effects can be achieved. To avoid repetition, this will not be repeated here.

[0112] The memory can be used to store software programs and various data. The memory can mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area can store an operating system, application programs or instructions required by at least one function (such as a sound playing function, an image playing function, etc.), and the like. In addition, the memory can include a volatile memory or a non-volatile memory, or the memory can include both a volatile memory and a non-volatile memory. The non-volatile memory can be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a Random Access Memory (RAM), a Static RAM (SRAM), a Dynamic RAM (DRAM), a Synchronous DRAM (SDRAM), a Double Data Rate SDRAM (DDR SDRAM), an Enhanced SDRAM (ESDRAM), a Synchlink DRAM (SLDRAM), and a Direct Rambus RAM (DRRAM). The memory in the embodiments of the present application includes but is not limited to these and any other suitable types of memory.

[0113] The processor can include one or more processing units; optionally, the processor integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and an application program, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above-mentioned modem processor can also not be integrated into the processor.

[0114] The embodiments of the present application also provide a readable storage medium, and the readable storage medium stores programs or instructions, which are executed by the processor to realize the processes of the above exposure control method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein.

[0115] The embodiments of the present application also provide a manufacturing method of a light source assembly, which is used to manufacture the light source assembly of any one of the above embodiments, such as the light source assembly shown in Figure 17 The method includes:

[0116] S1601, providing a substrate;

[0117] S1602, disposing at least one light emitting piece on the substrate; the light emitting piece comprises at least two light emitting rows, the at least two light emitting rows are arranged along a first direction, and adjacent two light emitting rows are not on the same straight line, the first direction is perpendicular to a moving direction of the light source assembly during printing;

[0118] S1603, packaging the substrate and the at least one light emitting piece to obtain the light source assembly.

[0119] In the embodiment, at least one light emitting piece is disposed on the substrate, and each light emitting piece comprises at least two light emitting rows. For any light emitting piece, the at least two light emitting rows are arranged along a first direction, and adjacent two light emitting rows are not on the same straight line, that is, the adjacent two light emitting rows are staggered in the first direction. The substrate and the at least one light emitting piece are packaged to obtain the light source assembly.

[0120] In the embodiment, at least one light emitting piece is disposed on the substrate, and each light emitting piece comprises at least two light emitting rows. For any light emitting piece, the at least two light emitting rows are arranged along a first direction, and adjacent two light emitting rows are not on the same straight line, that is, the adjacent two light emitting rows are staggered in the first direction. The substrate and the at least one light emitting piece are packaged to obtain the light source assembly.

[0121] The embodiment of the present application also provides the following embodiments:

[0122] Embodiment 1: a light source assembly applied to a 3D printing device, the light source assembly comprises:

[0123] at least one light emitting piece; the light emitting piece comprises:

[0124] at least two light emitting rows, the at least two light emitting rows are arranged along a first direction, and adjacent two light emitting rows are not on the same straight line, the first direction is perpendicular to a moving direction of the light source assembly during printing.

[0125] Embodiment 2: on the basis of embodiment 1, each light emitting row comprises at least two light emitting units;

[0126] The number of light emitting units included in different light emitting rows in the light emitting piece is the same or different;

[0127] When the number of light emitting rows is n, when n is greater than or equal to 3,

[0128] n light emitting rows are arranged alternately in front of and behind in the moving direction of the light source assembly, or n light emitting rows are arranged in a stepped manner in the moving direction of the light source assembly.

[0129] In embodiment 3, on the basis of embodiment 1, projections of two adjacent light-emitting rows in the first direction do not overlap, or projections of two adjacent light-emitting rows in the first direction partially overlap.

[0130] If the projections of two adjacent light-emitting rows in the first direction partially overlap, the amount of overlap of the projections of the two adjacent light-emitting rows in the first direction is a preset number of light-emitting units, the preset number being greater than 0 and less than 2.

[0131] In embodiment 4, on the basis of embodiment 3, each light-emitting row includes one light-emitting unit, the projections of the two adjacent light-emitting rows in the first direction partially overlap, and the amount of overlap of the projections is greater than 0 and less than 1.

[0132] In embodiment 5, on the basis of embodiment 1, when the number of light-emitting pieces is greater than or equal to 2, at least two light-emitting pieces are arranged along the moving direction of the light source assembly.

[0133] In embodiment 6, on the basis of embodiment 5, the distance between two adjacent light-emitting pieces is greater than 20 microns and less than 5 millimeters.

[0134] In the same light-emitting piece, the distance between two adjacent light-emitting rows in the moving direction of the light source assembly is greater than 20 microns and less than 5 millimeters.

[0135] In different light-emitting pieces, the number of light-emitting units included in the light-emitting rows corresponding in position is the same or different.

[0136] In different light-emitting pieces, the light-emitting units included in the light-emitting rows corresponding in position are arranged in alignment.

[0137] In different light-emitting pieces, the projections of the light-emitting units included in the light-emitting rows corresponding in position in the first direction partially overlap, and the amount of overlap is the same as the amount of overlap of two adjacent light-emitting rows in the moving direction in the same light-emitting piece.

[0138] In embodiment 7, on the basis of embodiment 5, for any first light-emitting row in a first light-emitting piece and a second light-emitting row adjacent to the first light-emitting row, and a third light-emitting row corresponding in position to the first light-emitting row in the moving direction in a second light-emitting piece adjacent to the first light-emitting piece, the second light-emitting row and the third light-emitting row are on the same straight line.

[0139] For any first light emitting row in the first light emitting piece and a second light emitting row adjacent to the first light emitting row, and a fourth light emitting row in the second light emitting piece adjacent to the first light emitting piece, corresponding to the second light emitting row in the moving direction, the first light emitting row and the fourth light emitting row are on the same straight line.

[0140] Embodiment 8, a 3D printing device, comprising:

[0141] The light source assembly according to any one of Embodiments 1 to 7.

[0142] Embodiment 9, an exposure control method applied to a 3D printing device, the 3D printing device comprising a light source assembly according to any one of Embodiments 1 to 7, the method comprising:

[0143] Controlling the light source assembly to be opposite to a to-be-solidified region and to move in a scanning manner;

[0144] During the scanning movement, when a light emitting piece of the light source assembly is opposite to a target region of the to-be-solidified region, controlling at least part of light emitting units in the light emitting piece to emit light to irradiate the target region.

[0145] Embodiment 10, based on Embodiment 9, the method further comprises:

[0146] When the projection parts of two adjacent light emitting rows of the light emitting piece in the first direction are partially overlapped, controlling at least part of light emitting units in one of the two adjacent light emitting rows to emit light, and at least part of light emitting units in the other of the two adjacent light emitting rows not to emit light;

[0147] The controlling at least part of light emitting units in one of the two adjacent light emitting rows to emit light, and at least part of light emitting units in the other of the two adjacent light emitting rows not to emit light, comprises:

[0148] Controlling light emitting units in one of the two adjacent light emitting rows to emit light, and light emitting units in the other of the two adjacent light emitting rows not to emit light, and light emitting units in the two adjacent light emitting rows not to emit light;

[0149] Wherein, the light emitting units completely overlapped are light emitting units whose area in the overlapped range is greater than or equal to a first preset percentage, and the light emitting units not completely overlapped are light emitting units whose area in the overlapped range is less than the first preset percentage.

[0150] In the embodiment 11, on the basis of the embodiment 9, the light source assembly comprises at least two light emitting members; and in the scanning movement, when the light emitting member of the light source assembly is opposite to a target region of the region to be solidified, at least part of the light emitting units in the light emitting member are controlled to emit light to irradiate the target region, which comprises:

[0151] In the scanning movement of the light source assembly, at a first time, at least part of the light emitting units in the first light emitting member emit light to irradiate a first target region of the region to be solidified; and at a second time, at least part of the light emitting units in the second light emitting member emit light to irradiate a second target region of the region to be solidified.

[0152] Wherein, the intersection area of the first target region and the second target region is greater than zero and less than the union area of the first target region and the second target region.

[0153] In the scanning movement of the light source assembly, at a first time, at least part of the light emitting units in the first light emitting member emit light to irradiate a first target region of the region to be solidified, which comprises:

[0154] At the first time, all the light emitting units in the first light emitting member corresponding to the region to be solidified are controlled to emit light to irradiate the first target region of the region to be solidified.

[0155] In the scanning movement of the light source assembly, at a second time, at least part of the light emitting units in the second light emitting member emit light to irradiate a second target region of the region to be solidified, which comprises:

[0156] At the second time, all the light emitting units in the second light emitting member corresponding to the region to be solidified are controlled to emit light, or the light emitting units in the second light emitting member corresponding to the region to be solidified and close to the edge position are controlled to emit light to irradiate the second target region of the region to be solidified.

[0157] The light emitting units close to the edge position comprise target light emitting units at the edge position of the region to be solidified; or the light emitting units close to the edge position comprise target light emitting units at the edge position of the region to be solidified and light emitting units adjacent to or spaced from the target light emitting units.

[0158] In the embodiment 12, a 3D printing device comprises a processor and a memory, the memory stores a program or instructions running on the processor, and the program or instructions are executed by the processor to realize the steps of the exposure control method in any one of the embodiments 9 to 11.

[0159] Embodiment 13, a readable storage medium, having stored thereon a program or instructions, which when executed by a processor implement the steps of the exposure control method according to any one of Embodiments 9 to 11.

[0160] Embodiment 14, a method for manufacturing a light source assembly, the method is used for manufacturing the light source assembly according to any one of Embodiments 1 to 7, the method comprises:

[0161] providing a substrate;

[0162] arranging at least one light emitting member on the substrate; the light emitting member comprises: at least two light emitting rows, the at least two light emitting rows are arranged along a first direction, and adjacent two of the light emitting rows are not on a same straight line, the first direction is perpendicular to a moving direction of the light source assembly when printing;

[0163] encapsulating the substrate and the at least one light emitting member to obtain the light source assembly.

[0164] It should be noted that, in this document, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or apparatus including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or apparatus. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or apparatus including the element. In addition, it should be pointed out that the scope of the methods and apparatuses in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0165] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above specific embodiments, the above specific embodiments are only illustrative, but not restrictive, and those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims.

Claims

1. A light source assembly, characterized by The light source assembly is applied to a 3D printing device, and the light source assembly comprises: at least one light emitting member, wherein the light emitting member comprises: at least two light emitting rows, wherein the at least two light emitting rows are arranged along a first direction, and adjacent two light emitting rows are not on the same straight line, and the first direction is perpendicular to the moving direction of the light source assembly during printing.

2. The light source assembly according to claim 1, wherein each of the light emitting rows comprises at least one light emitting unit; the different light emitting rows in the light emitting member comprise the same number or different number of light emitting units; the number of light emitting rows is n, and when n is greater than or equal to 3, the n light emitting rows are arranged alternately in the moving direction of the light source assembly, or the n light emitting rows are arranged in a stepped manner in the moving direction of the light source assembly.

3. The light source assembly according to claim 1, wherein the projection of adjacent two light emitting rows in the first direction has no overlap, or the projection of adjacent two light emitting rows in the first direction partially overlaps; when the projection of adjacent two light emitting rows in the first direction partially overlaps, the overlapping amount of the projection of adjacent two light emitting rows in the first direction is a preset number of light emitting units, and the preset number is greater than 0 and less than 2; each of the light emitting rows comprises one light emitting unit, and the projection of adjacent two light emitting rows in the first direction partially overlaps, and the overlapping amount of the projection is greater than 0 and less than 1.

5. The light source assembly according to claim 1, wherein when the number of at least one light emitting member is greater than or equal to 2, at least two light emitting members are arranged along the moving direction of the light source assembly.

6. The light source assembly according to claim 5, wherein the distance between adjacent two light emitting members is greater than 20 microns and less than 5 millimeters; in the same light emitting member, the distance between adjacent two light emitting rows in the moving direction of the light source assembly is greater than 20 microns and less than 5 millimeters; in different light emitting members, the number of light emitting units included in the light emitting rows corresponding in position in the moving direction is the same or different; the light emitting units included in the light emitting rows corresponding in position in different light emitting members are arranged in alignment; or the projection of the light emitting units included in the light emitting rows corresponding in position in different light emitting members in the first direction partially overlaps, and the overlapping amount is the same as the overlapping amount of adjacent two light emitting rows in the same light emitting member in the moving direction.

7. The light source assembly according to claim 5, wherein for any first light emitting row in a first light emitting member and a second light emitting row adjacent to the first light emitting row, and a third light emitting row corresponding in position to the first light emitting row in the moving direction in a second light emitting member adjacent to the first light emitting member, the second light emitting row and the third light emitting row are on the same straight line. ​ ​ ​ ​ ​ 4. The light source assembly of claim 3, wherein, ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For any first light emitting row in the first light emitting member and a second light emitting row adjacent to the first light emitting row, and a fourth light emitting row in the second light emitting member adjacent to the first light emitting member, corresponding to the position of the second light emitting row in the moving direction, the first light emitting row and the fourth light emitting row are on the same straight line.

8. A 3D printing device, characterized by Comprising: The light source assembly of any one of claims 1 to 7.

Images