WO2022217905A1 - 曲面屏弯折设备及曲面屏弯折方法 - Google Patents
曲面屏弯折设备及曲面屏弯折方法 Download PDFInfo
- Publication number
- WO2022217905A1 WO2022217905A1 PCT/CN2021/129590 CN2021129590W WO2022217905A1 WO 2022217905 A1 WO2022217905 A1 WO 2022217905A1 CN 2021129590 W CN2021129590 W CN 2021129590W WO 2022217905 A1 WO2022217905 A1 WO 2022217905A1
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- Prior art keywords
- screen
- bending
- bent
- curved
- area
- Prior art date
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- 238000005452 bending Methods 0.000 title claims abstract description 127
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000000853 adhesive Substances 0.000 claims description 25
- 230000001070 adhesive effect Effects 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 230000009467 reduction Effects 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/18—Handling of layers or the laminate
- B32B38/1866—Handling of layers or the laminate conforming the layers or laminate to a convex or concave profile
Definitions
- the present disclosure relates to the field of display technology, and in particular, to a curved screen bending device and a curved screen bending method.
- the edge of the display module (MDL) should also be simultaneously bent in a 3D shape, that is, the display screen needs to be Pad Bending to obtain a curved edge (Edge). Due to the existence of curved edges, when the screen is placed on a bending device, the back film of the flexible circuit board (FPC) connected to the edge of the screen will be reversely bent, resulting in risks such as metal wire breakage (crack) near the bending area.
- MDL display module
- FPC flexible circuit board
- Embodiments of the present disclosure provide a curved screen bending device and a curved screen bending method, which can solve the problems in the related art, such as metal wire breakage in the bending area caused by the phenomenon of reverse bending of the back film at the edge of the screen when the screen is bent .
- Some embodiments of the present disclosure provide a curved screen bending device for bending a screen to be bent, the screen to be bent includes a flat area, a bending area connected to the edge of the flat area, and a connection In the flexible circuit board in the bending area, the to-be-bent screen is bent to obtain a curved screen;
- the curved screen bending equipment includes:
- the screen bearing platform includes a flat first bearing surface
- circuit board bearing platform that can move relative to the screen bearing platform, the circuit board bearing platform includes a second bearing surface, and the circuit board bearing platform is located outside the screen bearing platform;
- the support and protection structure is arranged on the screen bearing platform, the support and protection structure includes a first side surface and a second side surface opposite to each other, and the first side surface is attached to the first bearing surface, The second side surface is used for supporting and fixing the screen to be bent, and the second side surface at least includes a curved surface bearing area, and the curved surface bearing area and the curved surface of the bending area have the same curvature.
- the curved bearing area includes a first part and a second part, the first part is used to support the to-be-bent area, and the second part is used to support the flexible circuit board.
- a binding structure is provided between the bending area and the flexible circuit board; an escape cavity is provided on the second side surface at a position corresponding to the binding structure.
- the support and protection structure is made of resin material.
- the support and protection structure is made of polyvinyl chloride material.
- the second side is provided with adhesive for sticking to or separating from the to-be-bent screen.
- the adhesive includes tack-reducing glue.
- the viscosity-reducing adhesive includes at least one of UV viscosity-reducing adhesive and thermal viscosity-reducing adhesive.
- the second side further includes a plane bearing area, and the plane bearing area is configured to fit with the plane area of the screen to be bent.
- Embodiments of the present disclosure also provide a method for bending a curved screen, using the curved screen bending equipment described above to bend the screen to be bent; the method for bending a curved screen includes:
- the screen to be bent is carried on the screen carrying platform, wherein the bending area on the screen to be bent is supported and fixed by the second side surface of the support protection structure, and the flexible circuit board is Supporting and fixing the circuit board carrying platform;
- the second side further includes a plane bearing area, and the plane bearing area is used to fit with the plane area of the screen to be bent;
- the described screen to be bent is carried on the screen carrying platform, specifically including:
- the plane area of the to-be-bent screen is supported, pasted and fixed by the plane bearing area, and the bending area of the to-be-bent screen is supported, pasted and fixed by the curved surface bearing area.
- the second side is provided with an adhesive for sticking or separating from the screen to be bent, and the adhesive includes a reducing adhesive;
- the method also includes:
- the screen to be bent is separated from the support and protection structure by means of UV irradiation or thermal viscosity reduction.
- the curved screen bending device and the curved screen bending method provided by the embodiments of the present disclosure can provide the bending area during the bending process of the curved screen by adding a support and protection structure to the bending area of the edge (Edge) of the screen to be bent. Support and protect the function to avoid the risk of reverse breakage, and at the same time protect the bending area from collision during the transportation of the display module after the bending, and improve its reliability and reliability.
- FIG. 1 shows a schematic structural diagram of the reverse bending phenomenon of the back film when the flexible display module is bent in the related art
- FIG. 2 shows a schematic structural diagram of the curved screen bending device provided in the embodiment of the present disclosure when the screen to be bent is bent;
- FIG. 3 is a schematic structural diagram of the curved screen bending apparatus provided in the embodiment of the present disclosure after the to-be-bent screen is bent.
- the curved screen module usually includes a flexible panel 1 and a cover 2, the edge of the curved screen module is folded outward, and the flexible module cover 2 can be bent repeatedly. Therefore, a curved SUS (stainless steel plate) is used on the inner side of the back film of the flexible panel 1 to fix the appearance of the 3D curved surface at the edge.
- a curved SUS stainless steel plate
- the curved screen bending device includes a screen carrying table 4 and a circuit board carrying table 5, but the screen carrying table 4 can only carry the flat area of the screen, and the circuit board carrying table 5 can only carry a flexible circuit board (FPC),
- FPC flexible circuit board
- the bending area of the screen is unsupported.
- the back film on the FPC side will be bent in reverse, resulting in stress concentration in the bending area and causing metal Crack and other problems (area A in Figure 1 is the reverse bending part), at the same time, due to the existence of the curved edge of the screen, the screen carrier 4 cannot absorb the edge area of the screen, and the edge area is easy to shake when bending.
- the embodiments of the present disclosure provide a curved screen bending device, which can solve the problems of metal wire breakage in the bending area caused by the reverse bending phenomenon of the back film at the screen edge when the screen is bent in the related art.
- the curved screen bending device provided in some embodiments of the present disclosure is used to bend the screen to be bent 10 , and the screen to be bent 10 includes a flat area 11 , a bending area 12 and a flexible circuit board 13, wherein the bending area 12 is connected to the edge of the flat area 11, the flexible circuit board 13 is connected to the bending area 12, and the screen 10 to be bent is bent to obtain a curved screen.
- the curved screen bending apparatus includes: a screen carrier 100 , a circuit board carrier 200 , and a support and protection structure 300 , wherein the screen carrier 100 includes a flat first A bearing surface, the circuit board bearing platform 200 can move relative to the screen bearing platform 100 , the circuit board bearing platform 200 includes a second bearing surface, and the circuit board bearing platform 200 is located outside the screen bearing platform 100 ;
- the support and protection structure 300 is disposed on the screen carrying platform 100 .
- the support and protection structure 300 includes a first side surface 310 and a second side surface 320 opposite to each other, and the first side surface 310 is attached to the first support surface.
- the second side surface 320 is used for supporting and fixing the screen 10 to be bent, and the second side surface 320 at least includes a curved surface bearing area 321 , and the curved surface bearing area 321 is bent with the bending area 12 The resulting surface has the same curvature.
- the curved screen bending device and the curved screen bending method provided by the embodiments of the present disclosure, by adding a support protection structure 300 to the edge bending area 12 of the screen 10 to be bent, during the bending process of the curved screen
- the area 12 provides support and protection to avoid the risk of back-breaking and wire breakage. At the same time, it protects the bending area 12 from collision during transportation of the display module after the bending is completed, thereby improving its reliability and reliability.
- the circuit board carrying table 200 moves relative to the screen carrying table 100, so that the flexible circuit board 13 is moved in advance. Bending to a certain radian position, that is, the predetermined angle between the second bearing surface of the circuit board carrying platform 200 and the first bearing surface of the screen bearing platform 100 is equal to the curved surface angle of the curved screen obtained after bending. Then, the screen 10 to be bent is placed on the screen carrier 100 and the circuit board carrier 200, and the flexible circuit board 13 on the edge of the screen 10 to be bent is supported and fixed by the circuit board carrier 200, so At least the bending area 12 of the screen 10 to be bent is supported and fixed by the supporting and fixing structure, so that the entire bending area 12 of the screen 10 to be bent is kept in a stable state, and the screen carrying table 100 and the circuit board carrying table 200 are guaranteed.
- the to-be-bent screen 10 usually includes a display panel 14 and a cover plate 15 attached to one side of the display panel, and is folded outwardly, that is, a side facing the display panel away from the cover plate side bending, therefore, when bending, the cover plate 15 side of the screen 10 to be bent is in contact with the second side surface 320 of the support protection structure 300, so that the support protection structure 300 supports and fixes the The screen 10 is to be bent.
- the second side surface 320 further includes a plane bearing area 322 , and the plane bearing area 322 has the same shape as the plane area 11 of the screen 10 to be bent.
- the support and protection structure 300 may be an integral structure disposed on the first bearing surface of the screen bearing platform 100 , and the second side surface 320 may not only include a curved bearing area 321 , but also ensure a flat bearing area 322 That is, the support and protection structure 300 not only supports and protects the bending area 12 of the screen 10 to be bent, but also supports and protects the flat area 11 of the screen 10 to be bent.
- the support and protection structure 300 can be integrally fixed on the first bearing surface of the screen bearing platform 100 to support and fix the entire screen 10 to be bent, so that, as shown in FIG. 2 , the FPC side of the screen 10 to be bent The transition between the curved area and the flat area 11 is well supported by the support and protection structure 300, and is not easy to shake during the bending process.
- the support and protection structure 300 may also only include the curved bearing area 321 .
- the curved bearing area 321 includes a first part 321 a and a second part 321 b, the first part 321 a is used to support the to-be-bent area 12 , so The second portion 321b is used to support the flexible circuit board 13 .
- the curved surface bearing area 321 of the support and protection structure 300 can not only support and protect the to-be-bent area 12 of the to-be-bent screen 10, but also support and protect the flexible In this way, the circuit board 13 can better support and protect the bending position.
- FIG. 2 there is a binding structure 14 between the bending area 12 and the flexible circuit board 13 ; the second side surface 320 corresponds to the binding structure 14 .
- An escape cavity 330 is provided at the position of the structure 14 .
- the support and protection structure 300 is made of resin material, for example, the support and protection structure 300 is made of polyvinyl chloride material.
- the support and protection structure 300 can be integrally formed with resin materials. Compared with rigid materials such as metal materials, resin materials are easy to form and have lower hardness, which can avoid damage to the screen 10 to be bent.
- the second side surface 320 is provided with an adhesive for sticking or separating with the screen to be bent 10 .
- the to-be-bent screen 10 is pasted and fixed by the adhesive, wherein the adhesive may be a viscosity-reducing adhesive, for example, at least one of UV viscosity-reducing adhesive and thermal viscosity-reducing adhesive.
- the adhesive may be a viscosity-reducing adhesive, for example, at least one of UV viscosity-reducing adhesive and thermal viscosity-reducing adhesive.
- an embodiment of the present disclosure also provides a method for bending a curved screen, using the curved screen bending device provided by the embodiment of the present disclosure to bend the screen 10 to be bent; the method for bending a curved screen includes the following steps:
- Step S01 controlling the relative movement of the circuit board supporting platform 200 and the screen supporting platform 100, so that the bearing surface of the circuit supporting platform and the first bearing surface of the screen supporting platform 100 form a predetermined angle;
- Step S02 carrying the screen 10 to be bent on the screen supporting platform 100 , wherein the bending area 12 on the screen 10 to be bent is supported and supported by the second side surface 320 of the support protection structure 300 .
- Fixed, the flexible circuit board 13 is supported and fixed by the circuit board carrying platform 200;
- Step S03 controlling the relative movement of the circuit board supporting platform 200 and the screen supporting platform 100 to bend the bending area 12 .
- the curved screen obtained after bending is shown in FIG. 3 .
- the circuit board supporting table 200 moves relative to the screen supporting table 100, so that the flexible circuit board 13 is pre-bent to the A certain radian position, that is, the predetermined angle between the second bearing surface of the circuit board bearing platform 200 and the first bearing surface of the screen bearing platform 100 is equal to the curved surface angle of the curved screen obtained after bending; then, The screen 10 to be bent is then placed on the screen support table 100 and the circuit board support table 200, the flexible circuit board 13 on the edge of the screen to be bent is supported and fixed by the circuit board support table 200, and the flexible circuit board 13 on the edge of the screen to be bent At least the bending area 12 of the folding screen 10 is supported and fixed by the supporting and fixing structure, so that the entire bending area 12 of the screen 10 to be bent is kept in a stable state, and the screen carrier 100 and the circuit board carrier 200 are fixed to be bent.
- the back film on the side where the flexible circuit board 13 of the screen 10 is to be folded ie, the FPC side
- the FPC side the back film on the side where the flexible circuit board 13 of the screen 10 is to be folded
- the second side surface 320 further includes a plane bearing area 322, and the plane bearing area 322 has the same shape as the plane area 11 of the screen 10 to be bent; in the method, the step S02 Specifically, it includes: supporting and pasting the flat area 11 of the screen 10 to be bent by the plane bearing area 322 , and supporting and pasting the bending area 12 of the screen 10 to be bent by the curved bearing area 321 fixed.
- the second side surface 320 is provided with an adhesive for sticking or separating from the screen 10 to be bent, and the adhesive includes an adhesive During the process and after the bending is completed, the screen 10 to be bent is separated from the support protection structure 300 by means of UV irradiation or thermal viscosity reduction.
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Description
Claims (12)
- 一种曲面屏弯折设备,其特征在于,用于弯折待弯折屏幕,所述待弯折屏幕包括平面区、连接于所述平面区边缘处的弯折区、及连接于所述弯折区的柔性电路板,所述待弯折屏幕弯折后得到曲面屏;所述曲面屏弯折设备包括:屏幕承载台,所述屏幕承载台包括呈平面的第一承载面;能够相对所述屏幕承载台移动的电路板承载台,所述电路板承载台包括第二承载面,所述电路板承载台位于所述屏幕承载台的外侧;支撑保护结构,所述支撑保护结构设置于所述屏幕承载台上,所述支撑保护结构包括相背的第一侧面和第二侧面,所述第一侧面与所述第一承载面贴合,所述第二侧面用于承载及固定所述待弯折屏幕,且所述第二侧面至少包括曲面承载区,所述曲面承载区与所述弯折区弯折后的曲面曲率相同。
- 根据权利要求1所述的曲面屏弯折设备,其特征在于,所述曲面承载区包括第一部分和第二部分,所述第一部分用于支撑所述待弯折区,所述第二部分用于支撑所述柔性电路板。
- 根据权利要求1所述的曲面屏弯折设备,其特征在于,所述弯折区与所述柔性电路板之间具有绑定结构;所述第二侧面在对应所述绑定结构的位置设有避让凹腔。
- 根据权利要求1所述的曲面屏弯折设备,其特征在于,所述支撑保护结构采用树脂类材质制成。
- 根据权利要求4所述的曲面屏弯折设备,其特征在于,所述支撑保护结构采用聚氯乙烯材料制成。
- 根据权利要求1所述的曲面屏弯折设备,其特征在于,所述第二侧面上设有用于与所述待弯折屏幕粘贴或分离的粘接胶。
- 根据权利要求7所述的曲面屏弯折设备,其特征在于,所述粘接胶包括减粘胶。
- 根据权利要求7所述的曲面屏弯折设备,其特征在于,所述减粘胶包括UV减粘胶、热减粘胶中的至少一种。
- 根据权利要求1所述的曲面屏弯折设备,其特征在于,所述第二侧面还包括平面承载区,所述平面承载区用于与所述待弯折屏幕的平面区贴合。
- 一种曲面屏弯折方法,其特征在于,采用如权利要求1至9任一项所述的曲面屏弯折设备弯折所述待弯折屏幕;所述曲面屏弯折方法包括:控制所述电路板承载台和所述屏幕承载台相对移动,使所述电路承载台的承载面与所述屏幕承载台的第一承载面之间呈预定角度;将所述待弯折屏幕承载于所述屏幕承载台上,其中,所述待弯折屏幕上的弯折区被所述支撑保护结构的第二侧面支撑及固定,所述柔性电路板被所述电路板承载台支撑及固定;控制所述电路板承载台和所述屏幕承载台相对移动,以弯折所述弯折区。
- 根据权利要求10所述的曲面屏弯折方法,其特征在于,所述第二侧面还包括平面承载区,所述平面承载区用于与所述待弯折屏幕的平面区贴合;所述方法中,所述将所述待弯折屏幕承载于所述屏幕承载台上,具体包括:将所述待弯折屏幕的平面区由所述平面承载区支撑及粘贴固定,将所述待弯折屏幕的弯折区由所述曲面承载区支撑及粘贴固定。
- 根据权利要求11所述的曲面屏弯折方法,其特征在于,所述第二侧面上设有用于与所述待弯折屏幕粘贴或分离的粘接胶,所述粘接胶包括减粘胶;所述方法中还包括:在弯折过程中及弯折完成后,通过UV照射减粘或者热减粘的方式,使所述待弯折屏幕与所述支撑保护结构分离。
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CN115206190B (zh) * | 2022-07-11 | 2023-11-28 | 武汉华星光电半导体显示技术有限公司 | 显示装置 |
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