Support bar and tensioning method

Abstract

The present embodiment provides a support bar and a tensioning method. A first aspect of the present embodiment provides a support bar including a support section and a precut section, the precut section being connected to both ends of the support section in the longitudinal direction of the support bar, the support section including a support body and a shielding portion, the support body extending along the longitudinal direction, the shielding portion being located on a first side of the support body, the second side of the support body facing the first side in a width direction perpendicular to the longitudinal direction, the precut section including a displacement compensation portion, the first side edge of the displacement compensation portion extending linearly from the first side to a free end of the precut section, and the second side edge of the displacement compensation portion inclining from the second side to the first side such that the width of at least a part of the displacement compensation portion gradually decreases from the support body to the free end.

Description

[Technical field]

[0001] This application claims priority to Chinese patent application No. 202110903244.0, entitled "Support Bar and Tensioning Method," filed on August 6, 2021, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of deposition equipment, and in particular to support bars and tensioning methods. [Background technology]

[0003] In the manufacturing process of an organic light-emitting diode (OLED) display panel, deposition is a common process method. In the deposition process, deposition materials are generally deposited on a substrate waiting for deposition through a mask plate. When manufacturing a display panel with a functional integration region, a special support bar is used to shield a part of the substrate waiting for deposition and to support the mask bar. The special support bar is easily displaced in the non-tensile direction during the tensioning process, which causes deposition anomalies in the functional integration region and low deposition accuracy, which affects the overall display effect of the display panel. Summary of the Invention

[0004] The present application aims to provide a support bar and a tensioning method that at least solves the problem that the support bar used in vapor deposition is prone to displacement in the non-tensile direction during the tensioning process.

[0005] A first aspect of an embodiment of the present application provides a support bar, the support bar comprising a support section and a precut section, both ends of the support section being connected to one precut section each in a longitudinal direction of the support bar, the support section comprising a support body and a shielding portion, the support body extending along the longitudinal direction, the shielding portion being located on a first side of the support body, and in a width direction perpendicular to the longitudinal direction, a second side of the support body facing the first side, the precut section comprising a displacement compensation portion, a first side edge of the displacement compensation portion extending along the longitudinal direction, and the second side edge of the displacement compensation portion inclining from the second side to the first side such that a width of at least a portion of the displacement compensation portion gradually decreases from the support body toward the free end.

[0006] In the support bar for a mask plate provided in the first aspect of the embodiment of the present application, a displacement compensation portion is provided in the precut section of the support bar, thereby reducing the non-tensile direction displacement value, further improving the tensioning accuracy of the support bar, ensuring the alignment accuracy between the shielding portion and the pre-set functional integration area on the substrate waiting for deposition, improving the deposition accuracy, avoiding the deposition of deposition material in the functional integration area, and improving the display effect of the entire display panel.

[0007] A second aspect of the present invention provides a stretching method for performing a stretching process on the support bar according to the first aspect of the present invention, the method comprising: performing tension processing along the longitudinal direction on two displacement compensation parts facing each other in the longitudinal direction to obtain a tensioned support bar; welding the tensioned support bar to the mask plate frame; and removing the pre-cut section.

[0008] According to the tensioning method of the second aspect of the embodiment of the present application, the displacement of the support bar in the non-tensile direction after tensioning is reduced, the tensioning accuracy of the support bar in the mask plate after tensioning is improved, and further the shielding accuracy of a specified functional integration area by the shielding portion is improved, thereby improving the display effect of the display panel. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic diagram showing a state in which a support bar including a typical shielding portion is stretched. [Diagram 2] FIG. 2 is a schematic structural diagram of a support bar according to an embodiment of the first aspect of the present application. [Diagram 3] FIG. 2 is a schematic structural diagram of a support bar according to another embodiment of the first aspect of the present application. [Figure 4] FIG. 2 is a schematic structural diagram of a support bar according to yet another embodiment of the first aspect of the present application. [Diagram 5] FIG. 2 is a schematic structural diagram of a support bar according to yet another embodiment of the first aspect of the present application. [Figure 6] FIG. 2 is a schematic structural diagram of a support bar according to yet another embodiment of the first aspect of the present application. [Figure 7] FIG. 2 is a schematic diagram showing a support bar in a tensioned state in one embodiment of the first aspect of the present application. [Figure 8] FIG. 2 is a schematic structural diagram of a support bar according to yet another embodiment of the first aspect of the present application. [Figure 9] FIG. 2 is a schematic structural diagram of a support bar according to yet another embodiment of the first aspect of the present application. [Figure 10] FIG. 2 is a schematic structural diagram of a support bar according to yet another embodiment of the first aspect of the present application. [Figure 10a] FIG. 11 is an enlarged schematic view of a portion A of FIG. [Figure 10b] FIG. 11 is an enlarged schematic view of a portion B of FIG. [Figure 11] FIG. 2 is a schematic diagram showing a support bar in a tensioned state in one embodiment of the first aspect of the present application. [Figure 12] 4 is a flowchart of a tensioning method according to a second embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The following describes the features and exemplary embodiments of each aspect of the present application in detail, and in order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application will be described in more detail below with reference to the drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely configured to illustrate the present application, and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is provided merely to illustrate the present application and to better understand the present application.

[0011] It should be noted that in this application, relational terms such as first and second are merely intended to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that such an actual relationship or order exists between these entities or operations. Also, the terms "comprise", "comprises", or any other variation thereof are intended to cover a non-exclusive inclusion, and a process, method, article, or device that includes a set of elements not only includes those elements, but also includes other elements not expressly listed, or includes elements inherent in such process, method, article, or device. In the absence of more limitations, an element limited by the phrase "comprises" does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0012] The inventor has found that, after a long period of intensive research, deposition is a common process method in the manufacturing process of an OLED display panel. In the deposition process, deposition material is generally deposited on a deposition-ready substrate through a mask plate. When manufacturing a display panel having a function integration region, a special support bar is used to shield a part of the deposition-ready substrate and support the mask bar. A shielding part is provided on one side of the general special support bar. The shielding part shields the deposition material, so that the deposition material is not deposited on the pre-set function integration region on the deposition-ready substrate, and the function integration region of the manufactured display panel is not luminous. Generally, a camera, a face recognition sensor, and other function modules are integrated in the function integration region, and the deposition material is not deposited on the function integration region.

[0013] When manufacturing a mask plate, it is necessary to tension the support bar provided with the shielding portion by pulling the support bar along its own longitudinal direction and then welding the support bar to the mask frame. Usually, in the tensioning process, the shielding portion is generally concentrated on one side of the support bar, so that the side of the support bar where the shielding portion is provided and the other side (the other side and the side where the shielding portion is provided face each other in the width direction of the support bar) are both contracted and deformed inwardly due to the tensile force. During the contraction deformation, the shielding portion on the side where the shielding portion is provided shrinks due to the tensile force, so that a superimposed contraction effect occurs on the side of the support bar where the shielding portion is provided.

[0014] As shown in Fig. 1, during the tensioning process of the support bar, the pressing action from the side where the shielding part is provided to the other side is greater than the pressing action from the other side to the side where the shielding part is provided, and ultimately causes a protruding deformation to the other side in the entire support bar, forming a non-tensile direction displacement. The inventor further discovered that, in general, when a non-tensile direction displacement occurs in the support bar, the non-tensile direction displacement value at the middle part of the support bar is greater than the non-tensile direction displacement values ​​on both sides of the support bar. In the embodiment of the present application, the non-tensile direction displacement value h is defined as the distance from any part of the support bar to a straight line existing in the tensile direction in the width direction perpendicular to the tensile direction (longitudinal direction of the support bar).

[0015] In view of the discovery and analysis of the above problems, the present application is proposed.

[0016] As shown in FIG. 2, a first aspect of an embodiment of the present application provides a support bar 1 for a mask plate, the support bar 1 including a support section 11 and a precut section 12, and in the longitudinal direction X of the support bar 1, both ends of the support section 11 are respectively connected to one precut section 12.

[0017] The support section 11 includes a support body 111 and at least one shielding portion 112, the support body 111 extending along the longitudinal direction X of the support bar 1, the at least one shielding portion 112 being located on a first side 111a of the support body 111, and in a width direction Y perpendicular to the longitudinal direction X of the support bar 1, a second side 111b of the support body 111 facing the first side 111a of the support body 111.

[0018] The precut section 12 includes a displacement compensation portion 121, and a first side 122 of the displacement compensation portion 121 extends along the longitudinal direction X. A second side 123 of the displacement compensation portion 121 slopes from the second side 111b of the support body 111 toward the first side 111a of the support body 111 such that the width of at least a portion of the displacement compensation portion 121 gradually decreases from the support body 111 toward the free end. In the longitudinal direction X of the support bar 1, the free end of the precut section 12 is an end of the precut section 12 that is remote from the support section 11.

[0019] In some embodiments, the number of the shielding portions 112 is multiple, and the multiple shielding portions 112 are distributed at intervals along the longitudinal direction X of the support bar 1 on the first side 111 a of the support body 111 .

[0020] The support bar 1 for a mask plate according to the first embodiment of the present application is provided with a displacement compensation portion 121 in the precut section 12 of the support bar 1. In the tensioning process of the support bar 1, the tensioning mechanism clamps the displacement compensation portion 121 of the support bar 1 and performs tensioning and pulling on the support bar 1 along the longitudinal direction X of the support bar 1. At least a part of the width of the displacement compensation portion 121 gradually decreases from the support body 111 toward the free end and toward the first side 111a of the support body 111, so that the clamping center line of the clamping mechanism is displaced toward the first side 111a. Due to the displacement of the clamping center line, the tensioning force is also displaced toward the first side 111a, which reduces the pressing action of the shielding portion 112 located on the first side 111a of the support body 111 toward the second side 111b of the support body 111 during the tensioning process, and reduces the non-tension direction displacement value of the support bar 1 toward the second side 111b of the support body 111. By reducing the non-tensile direction displacement value, the tensioning accuracy of the support bar 1 is further improved, the alignment accuracy between the shielding portion 112 and a specified functional integration area on the substrate awaiting deposition is ensured, the deposition accuracy is improved, the deposition material is prevented from depositing in the functional integration area, and the display effect of the entire display panel is improved.

[0021] In some embodiments, the support body 111 and the pre-cut section 12 of the support section 11 in the support bar 1 have an overall thick structure, i.e., no thinning process such as etching is performed, which is advantageous for realizing the supporting function of the support body 111 and for the pre-cut section 12 to maintain clamping stability during the tensioning process. The shielding section 112 adopts a half-etching process, which ensures the shielding function of the shielding section 112 in a predetermined functional integration region, reduces the overall weight load on the first side 111a of the support body 111, and further prevents the occurrence of non-tensile direction displacement.

[0022] As shown in FIG. 3, in some embodiments, the support body 111 of the support section 11 is further provided with a shielding bar engagement portion 113. The shielding bar engagement portion 113 is provided between two adjacent shielding portions 112, and the shielding bar engagement portion 113 has a half-etched structure, which is advantageous for the engagement between the support bar 1 and the shielding bar engagement portion 113 that are provided to overlap each other during the formation of the mask plate. When the number of shielding portions 112 is greater than two, the number of shielding bar engagement portions 113 may be multiple, and the multiple shielding bar engagement portions 113 are provided at intervals. In the width direction Y, the shielding bar engagement portion 113 extends in the width direction Y, the width of the shielding bar engagement portion 113 is greater than the width of the support body 111, and an R chamfer is formed at the connection point between the shielding bar engagement portion 113 and the support body 111.

[0023] In some alternative embodiments, the second side 123 is a straight side, the entire second side 123 is a straight side located on the same horizontal line, and there is no bending point on the second side 123. Referring to Figures 2 and 3, in some examples, the second side 123 is inclined from the second side 111b toward the first side 111a of the support body 11, and the second side 123 extends from the second side 111b of the support body 111 to the free end of the displacement compensation portion 121.

[0024] As shown in FIG. 4, in some examples, the second side 123 is a straight side, and the second side 123 is a bent straight side consisting of at least two straight sections. In these examples, the second side 123 includes a first straight section 123a and a second straight section 123b. The first straight section 123a extends obliquely from the second side 111b to the first side 111a of the support body 11, and the first straight section 123a extends to the center of the displacement compensation part 121 and is adjacent to the second straight section 123b. The second straight section 123b extends to the free end of the displacement compensation part 121, and the second straight section 123b is provided parallel to the first side 122.

[0025] As shown in FIG. 5, in some embodiments, the second side 123 is an arcuate side.

[0026] As shown in FIG. 6, in some alternative embodiments, the maximum width L 1 and the minimum width L of the displacement compensation portion 121 2 satisfies the following relation 1.

[0027]

number

[0028] In some examples, the maximum width of the displacement compensation portion 121 is the width of the support body 111. In the course of experiments, the maximum non-tensile direction displacement value of the support bar 1 having a typical shielding portion 112 is about 330 μm to 340 μm. 1 and the minimum width L of the displacement compensation portion 121 2 It was discovered that when the above relational expression 1 is satisfied, the non-tensile direction displacement value of the support bar 1 during the tensioning process of the support bar 1 is significantly reduced, and the maximum non-tensile direction displacement value is reduced to between 60 μm and 100 μm.

[0029] Furthermore, in some alternative embodiments, the maximum width L of the displacement compensation portion 121 1 and the minimum width L of the displacement compensation portion 121 2 satisfies the following relation 2.

[0030]

number

[0031] In these embodiments, the maximum width L of the displacement compensation portion 121 1 and the minimum width L of the displacement compensation portion 121 2 When the relationship between the non-tensile direction displacement and the tension direction displacement satisfies the above-mentioned relational expression 2, the non-tensile direction displacement value of the support bar 1 during the tensioning process of the support bar 1 is further significantly reduced, and the maximum non-tensile direction displacement value is reduced to between 60 μm and 80 μm.

[0032] In some selectable embodiments, the support section 11 and the precut section 12 are adjacent to each other in the longitudinal direction X, and a precut line q is provided between the support section 11 and the precut section 12, and the support section 11 and the precut section 12 are partitioned by the precut line q. In some examples, the support section 11 and the precut section 12 are integrally formed of the same material. In the process of manufacturing the precision mask plate, after the support bar 1 is stretched, the support section 11 is welded to the mask plate frame, and then the precut section 12 is cut and removed along the precut line q.

[0033] In some embodiments, the multiple shielding portions 112 are distributed at intervals along the longitudinal direction X on the first side 111a of the support body 111, and the support body 111 further includes a welding groove 114, which is located between the shielding portion 112 closest to the precut section 12 and the precut line q. In the welding process, the welding groove 114 is aligned with the mask plate frame, and the welding groove 114 is welded to the mask plate frame to realize a fixed connection between the support section 11 and the mask plate frame.

[0034] In the embodiment of the present application, the support bar 1 includes pre-cut lines q and weld grooves 114, but for the sake of simplicity, the pre-cut lines q and weld grooves 114 are not fully shown in the drawings corresponding to the following embodiments.

[0035] As shown in FIG. 7, in some optional embodiments, the precut section 12 further includes a buffer portion 125, which is located between the support section 11 and the displacement compensation portion 121, and the buffer portion 125 further includes a transition side edge 124, which extends linearly from the second side 111b of the support body 111 to the second side 123, and the extension direction of the first side edge 122 and the extension direction of the transition side edge 124 are parallel to each other.

[0036] In these embodiments, the buffer portion 125 protects the support section 11 from interference during the tensioning process and the subsequent welding and cutting and removal processes of the precut section 12, improving the quality of manufacturing the mask plate and improving deposition accuracy.

[0037] In some embodiments, in the longitudinal direction X, the length of the transition side 124 ranges from 20 mm to 25 mm.

[0038] In some embodiments, in the longitudinal direction X, the length of the transition side 124 ranges from 24 mm to 25 mm.

[0039] FIG. 8 is a diagram showing the configuration of the support bar 1 having the displacement compensation part 121 in the tensioning process in one example. As shown in FIG. 8, the inventor further found that the maximum non-tensile direction displacement value of the support bar 1 having the displacement compensation part 121 is obviously reduced in the tensioning process. However, the support section 11 of the support bar 1 forms three sections A, B and C in FIG. 8, and the A section and the C section are close to the precut section 12, and the non-tensile direction displacement value of the A section and the C section is between 60 μm and 80 μm, and the degree of non-tensile direction displacement is large, and tends to be displaced toward the first side 111a of the support body 111. The B section is located in the center of the support section 11, and the non-tensile direction displacement value of the B section is 5 μm or less. From the above experimental analysis, the provision of the displacement compensation part 121 has a good effect on reducing the non-tensile direction displacement value of the entire support bar 1, and is particularly advantageous for the center of the support section 11. After installing the displacement compensation section 121, it is necessary to further optimize the structure of the support bar 1 so as to further reduce the non-tensile direction displacement compensation value of the two parts (section A and section B) in the support section 11 that are close to the precut section 12.

[0040] As shown in Fig. 9, in some embodiments, a new counterweight design is added to a general support bar 1 to further reduce the non-tension direction displacement compensation value of the portion of the support section 11 close to the precut section 12. As shown in Fig. 10, Fig. 10a and Fig. 10b, in some embodiments, a counterweight portion 126 is further provided based on the support bar 1 having the displacement compensation portion 121 to further reduce the non-tension direction displacement compensation value of the portion of the support section 11 close to the precut section 12.

[0041] In some embodiments, a counterweight portion 126 is added to the precut section 12 of the support bar 1. The counterweight portion 126 is provided on the same side as the shielding portion 112, and the counterweight portion 126 is provided protruding from the first side edge 122. In some embodiments, the shape of the counterweight portion 126 is the same as the shape of the shielding portion 112, and the size of the counterweight portion 126 may be different from the size of the shielding portion 112. In some embodiments, the size of the counterweight portion 126 is larger than the size of the shielding portion 112. The counterweight portion 126 is a substantially rectangular sheet-like structure, and the counterweight portion 126 is a sheet-like structure that extends from the first side 111a of the support body 111 in a direction opposite to the second side 111b of the support body 111. A R chamfer is formed at the connection point between the counterweight portion 126 and the first side edge 122, and the corners of the counterweight portion 126 are rounded. In some embodiments, the counterweight portion 126 is not processed by the half-etching process and is a full-thickness structure, which can increase the counterweight of the first side 111a of the precut section 12 (the same side as the first side 111a of the support body 111) and further reduce the non-tensile direction displacement compensation value of the portion of the support section 11 close to the precut section 12.

[0042] In some embodiments, as shown in FIG. 10, FIG. 10a and FIG. 10b, the precut section 12 further includes a buffer portion 125, the buffer portion 125 includes a transition side edge 124, the transition side edge 124 extends linearly from the second side 111b of the support body 111 to the second side edge 123, and the extension direction of the first side edge 122 and the extension direction of the transition side edge 124 are parallel to each other. In the longitudinal direction X, the counterweight portion 126 is provided corresponding to a part of the transition side edge 124 and a part of the second side edge 123. In the longitudinal direction X, the part of the precut section 12 corresponding to the transition side edge 124 is located between the support section 11 and the displacement compensation portion 121. The part corresponding to the transition side edge 124 protects the support section 11 from interference during the tensioning process and the subsequent welding and cutting and removing process of the precut section 12, improving the quality of manufacturing the mask plate and improving the deposition accuracy.

[0043] In some embodiments, the size of the counterweight portion 126 is larger than the size of the shielding portion 112. The counterweight portion 126 is a substantially rectangular sheet-like structure that extends from the first side 111a of the support body 111 in a direction opposite to the second side 111b of the support body 111. A round chamfer is formed at the connection point between the counterweight portion 126 and the first side edge 122. The radius R of the round chamfer is 1 The value ranges from 2.0 mm to 2.5 mm. Furthermore, the radius R of the R chamfer 1 The range of the value of is 2.1 mm to 2.2 mm. The corners of the counterweight portion 126 are rounded, and the radius R 2 The value ranges from 1.0 mm to 1.5 mm. 2 The value range of L is 1.1 mm to 1.2 mm. In the width direction Y, the counterweight portion 126 includes a straight side parallel to the width direction Y. The straight side is located between the R chamfer and the corner. The value range of L is 1.0 mm to 1.2 mm. Furthermore, the value range of L is 1.10 mm to 1.15 mm.

[0044] In some alternative embodiments, the shortest distance d between the precut line q and the counterweight portion 126 in the longitudinal direction X is 2 The value of ranges from 4 mm to 5 mm. In these embodiments, the shortest distance between the precut line q and the counterweight portion 126 is also the shortest distance between the support section 11 and the counterweight portion 126.

[0045] In some embodiments, the shortest distance d between the precut line q and the counterweight portion 126 in the longitudinal direction X relative to the length of the transition side 124 2 In some embodiments, the ratio of the length d of the transition side 124 is 1:6 to 1:5. 1 is the shortest distance from the displacement compensation part 121 to the support section 11. The shortest distance d between the precut line q and the counterweight part 126 for the shortest distance from the displacement compensation part 121 to the support section 11 2 The ratio is 1:6 to 1:5, which ensures that the non-tensile displacement compensation value of the central part of the support section 11 is reduced to an acceptable range, and ensures that the non-tensile displacement compensation value of the part of the support section 11 near the pre-cut section 12 is reduced to an acceptable range, and the difference between the non-tensile displacement compensation value of the central part of the support section 11 and the non-tensile displacement compensation value of the part of the support section 11 near the pre-cut section 12 is reduced, thereby improving the tensioning accuracy, further ensuring the deposition accuracy of the functional integration area, and improving the display effect of the display panel.

[0046] In some embodiments, a counterweight portion 126 is further provided based on the support bar 1 having the displacement compensation portion 121. The second side 123 of the displacement compensation portion 121 is a straight side. 1 and the minimum width L of the displacement compensation portion 121 2satisfies the above-mentioned Relational Expression 2. In the longitudinal direction X, the support section 11 and the precut section 12 are provided adjacent to each other, and a precut line q is provided between the support section 11 and the precut section 12. The precut section 12 further includes a buffer portion 125, and the buffer portion 125 includes a transition side edge 124. The transition side edge 124 extends linearly from the second side 111b of the support body 111 to the second side edge 123, and the extension direction of the first side edge 122 and the extension direction of the transition side edge 124 are parallel to each other. In the longitudinal direction X, the counterweight portion 126 is provided corresponding to a part of the transition side edge 124 and a part of the second side edge 123. The support body 111 further includes a welding groove 114, the welding groove 114 being located between the shielding portion 112 closest to the precut section 12 and the precut line q, and the welding groove 114 being further located between the shielding bar engagement portion 113 closest to the precut section 12 and the precut line q. The counterweight portion 126 is a substantially rectangular sheet-like structure, and the counterweight portion 126 is a sheet-like structure extending from the first side 111a of the support body 111 in a direction opposite to the second side 111b of the support body 111. An R-chamfer is formed at the connection point between the counterweight portion 126 and the first side edge 122. The radius R of the R-chamfer is 1 / 2. 1 The range of the value of is 2.1 mm to 2.2 mm. The corners of the counterweight portion 126 are rounded, and the radius R 2 The value range of is 1.1 mm to 1.2 mm. In the width direction Y, the counterweight portion 126 includes a straight side parallel to the width direction Y. The value range of the length L of the straight side is 1.10 mm to 1.15 mm. In the longitudinal direction X, the shortest distance d between the precut line q and the counterweight portion 126 is 2 The range of the length d of the transition side 124 in the longitudinal direction X is 4 mm to 5 mm. 1 The shortest distance d between the precut line q and the counterweight portion 126 2 The ratio is 1:6 to 1:5.

[0047] 11, a tensioning experiment was conducted on the above embodiment, and it was found that the non-tensile direction displacement value in the center (section B) of the support section 11 was 4 μm or less, and the non-tensile direction displacement compensation values ​​of the two sections (section A and section B) in the support section 11 close to the precut section 12 were also 4 μm or less. As can be seen from the experimental results, by simultaneously installing the displacement compensation part 121 and the counterweight part 126 on the support bar 1, the degree of non-tensile direction displacement of the entire support section 11 can be greatly reduced, the tensioning accuracy of the support bar 1 can be guaranteed, the shielding accuracy of the predetermined function integration area by the shielding part 112 can be improved, and the deposition accuracy near the predetermined function integration area of ​​the substrate waiting for deposition can be further improved, optimizing the display effect of the display panel.

[0048] As shown in FIG. 12, a second aspect of the embodiment of the present application provides a stretching method for performing a stretching process on the support bar in the first aspect of the embodiment of the present application.

[0049] The method includes the steps of: performing tensioning treatment along the longitudinal direction of the support bar for two longitudinally opposing displacement compensation parts to obtain a tensioned support bar (S10); welding the tensioned support bar to a mask plate frame (S20); and removing the precut section (S30).

[0050] In some alternative embodiments, when the support bar is tensioned using the tensioning mechanism, the clamping member clamps at least a part of the displacement compensation section such that the clamping centerline is displaced to the first side of the support section. The tensioning mechanism tensions the two displacement compensation sections facing each other in the longitudinal direction of the support bar along the longitudinal direction of the support bar, thereby tensioning the support bar in the longitudinal direction of the support bar, thereby forming the tensioned support bar.

[0051] According to the tensioning method of the second aspect of the embodiment of the present application, the non-tensile direction displacement of the support bar after tensioning is reduced, the tensioning accuracy of the support bar in the mask plate after tensioning is improved, and further the shielding accuracy of a specified functional integration area by the shielding portion is improved, thereby improving the display effect of the display panel.

[0052] According to the above embodiments of the present application, these embodiments are not described in detail in all details, and the present invention is not limited only to the above specific embodiments. From the above description, it is apparent that many modifications and variations are possible. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can fully utilize the present application and modifications based on the present application. The present application is limited only by the claims and the full scope and equivalents thereof.

Claims

1. A support bar for supporting a deposition mask plate, comprising: A support section and a precut section are provided, The support section includes a support body and at least one shielding portion, the support body extends along a longitudinal direction of the support bar, the at least one shielding portion is located on a first side of the support body, and a second side of the support body faces the first side in a width direction perpendicular to the longitudinal direction, and the shielding portion shields the deposition material; the precut section includes a displacement compensation portion, a first side of the displacement compensation portion extending linearly from the first side to a free end of the precut section, and a second side of the displacement compensation portion sloping from the second side to the first side such that a width of at least a portion of the displacement compensation portion gradually decreases from the support body toward the free end and gradually decreases toward the first side of the support body; A support bar, each end of the support section being connected to one of the precut sections in the longitudinal direction.

2. the second side is a straight side, or the second side is an arcuate side, and / or The support bar of claim 1 , wherein the second side includes at least two straight sections.

3. The maximum width L1 of the displacement compensation portion and the minimum width L2 of the displacement compensation portion satisfy the following relational expression 1, or The maximum width L1 of the displacement compensation portion and the minimum width L2 of the displacement compensation portion satisfy the following relational expression 2. The support bar of claim 1 . [0010] [0025]

4. The support section and the precut section are provided adjacent to each other in the longitudinal direction, and a precut line is provided between the support section and the precut section, and the support section and the precut section are partitioned by the precut line; The number of the shielding portions is multiple, the multiple shielding portions are distributed at intervals along the longitudinal direction on the first side of the support body, and the support body further includes a weld groove located between the precut line and the shielding portion closest to the precut section. The support bar of claim 1 .

5. In the longitudinal direction, the precut section further includes a buffer section located between the support section and the displacement compensation section, the buffer section including a transition side edge, the transition side edge extending linearly from the second side of the support body to the second side edge, and the extension direction of the first side edge and the extension direction of the transition side edge are parallel to each other; In the longitudinal direction, the length of the transition side is in the range of 20 mm to 25 mm.

5. The support bar of claim 4.

6. The precut section further includes a counterweight portion provided on the same side as the shielding portion and protruding from the first side edge, The shape of the counterweight portion is the same as the shape of the shielding portion, The counterweight portion has a substantially rectangular sheet-like structure, and a R chamfer is formed at a connection point between the counterweight portion and the first side edge, and the corners of the counterweight portion are rounded. The radius R1 of the chamfer is in the range of 2.0 mm to 2.5 mm, and the radius R2 of the corner is in the range of 1.0 mm to 1.5 mm.

6. The support bar of claim 5.

7. In the width direction, the counterweight portion includes a straight side parallel to the width direction, and the straight side is located between the R chamfer and the corner portion, The length L of the straight side is in the range of 1.0 mm to 1.2 mm.

7. The support bar of claim 6.

8. In the longitudinal direction, the shortest distance d2 between the precut line and the counterweight portion is in the range of 4 mm to 5 mm, and / or In the longitudinal direction, the ratio of the length d1 of the transition side edge to the shortest distance d2 between the precut line and the counterweight portion is 1:6 to 1:

5.

7. The support bar of claim 6.

9. The support body of the support section further includes a shield bar engagement portion provided between two adjacent shield portions, The shield bar engagement portion extends in the width direction, and the width of the shield bar engagement portion is greater than the width of the support body. A support bar according to any one of claims 1 to 5.

10. A method for performing a tensioning process on the support bar according to any one of claims 1 to 5, comprising the steps of: performing a tension process along the longitudinal direction on the two displacement compensation parts facing each other in the longitudinal direction to obtain the tensioned support bar; welding the tensioned support bar to a mask plate frame; removing the pre-cut section; A tensioning method including:

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