Attaching manufacturing method of hyperbolic glass display screen

Abstract

The invention discloses a hyperbolic glass display screen fitting manufacturing method. The method comprises the following steps: preparing a first laminated body; deformation tools are prepared, wherein two sets of first deformation tools and two sets of second deformation tools are manufactured according to the curvature of the second curved glass base material; preparing a second laminated body: obtaining the second laminated body through a deformation tool; and preparing a third laminated body: sequentially laminating and laminating the first laminated body, the second laminated body, the Teflon film, the buffer layer, the Teflon film and the second curved glass pressing plate to form the third laminated body, wrapping and covering the third laminated body with the upper and lower groups of polyurethane films, vacuumizing the interior, placing the third laminated body in the high-pressure kettle, and carrying out high-temperature pressurization treatment to obtain the finished product. The polyurethane film, the second curved glass pressing plate, the Teflon film, the buffer cementing layer and the Teflon film are sequentially removed after the product is taken out of the kettle, and finally the hyperbolic glass display screen is formed. The method has the advantages that the reject ratio of display screen fragmentation in production can be reduced, and the yield is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of display screen manufacturing, and in particular to a method for laminating and manufacturing a hyperbolic glass display screen. Background Art

[0002] Nowadays, laminated flat glass with display function is more and more widely used in various scenarios, and the glass technology of flat panel display screen is quite mature; single-curved display screens have also begun to be used in a small range, but hyperbolic display screens have not yet been applied to the market; the difficulty in solving this problem is that during the production process, the bonding substrate (the substrate is generally glass) is a hyperbolic surface, and the display screen is a flat surface. The two are bonded together, and after special high-temperature pre-pressing or vacuuming and high-temperature and high-pressure process treatment during the production process, the hyperbolic glass and the OLED display screen are permanently bonded into a composite glass product. However, during production, due to stress, rebound and other effects, there will always be phenomena such as separation of the OLED display screen adhesive layer and breakage of the FPC cable, causing the display screen to tear. This leads to low yield and increased production costs.

[0003] At present, the preparation method of hyperbolic OLED display laminated glass is mainly based on the flat-panel lamination process to composite OLED display screen, and its production process operation is as follows: ① Lamination: stack the middle buffer organic adhesive layer between two pieces of hyperbolic glass, and cut off the excess organic adhesive layer at the edge; place the organic adhesive layer again on the upper glass surface, place the OLED display on the adhesive layer, and cut off the excess organic adhesive layer at the edge of the display.

[0004] ② Vacuuming: Place the entire laminate into a sealed bag made of polyurethane film, remove the air in the sealed bag through a vacuum tube, and then send it into an autoclave for high-pressure treatment; ③ High pressure: The vacuum laminate is placed in an autoclave, and laminated glass is formed after a long period of high temperature and high pressure.

[0005] Since the OLED display is flat, it will deform after being bonded to the curved glass. When high-pressure production is performed after the lamination is completed, the surface of the OLED display will be compressed, resulting in uneven pressure due to the difference in film thickness. As a result, the display will shatter due to uneven pressure during the high-pressure process. Summary of the invention

[0006] The purpose of the present invention is to provide a method for laminating and manufacturing a hyperbolic glass display screen, which separates the adhesive layer and the OLED display screen for lamination production by a step-by-step method, first fixes the adhesive layer, and when laminating the OLED display screen, adds an adhesive buffer layer between the OLED display screen and the pressing plate to reduce the pressure, thereby reducing the defective rate of display screen breakage during production and improving the yield rate.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions: A method for laminating a hyperbolic glass display screen, characterized in that it comprises the following steps: Prepare a first laminate: stack and bond the first curved glass substrate, the first film adhesive layer, the second curved glass substrate, the second film adhesive layer, the Teflon film, the nylon mesh, and the first curved glass pressing plate in order, then cover and wrap the first curved glass substrate with two sets of polyurethane films, evacuate the interior, place the laminate in an autoclave under high temperature and pressure, and remove the polyurethane film, the glass pressing plate, the nylon mesh, and the Teflon film in order after exiting the autoclave to obtain a first laminate; Preparing a deformation tool: preparing two sets of a first deformation tool and a second deformation tool according to the curvature of the second curved glass substrate; Preparing a second laminate: laminating and bonding the first deformation tooling, the buffer layer, the Teflon film, the third film adhesive layer, the OLED display, the Teflon film, the buffer layer, and the first deformation tooling in sequence, and subsequently performing a first constant temperature deformation treatment, removing the first deformation tooling, and bonding and fixing the two sides with the second deformation tooling to obtain a second laminate; Preparation of the third laminate: The first laminate, the second laminate, the Teflon film, the buffer layer, the Teflon film, and the second curved glass platen are stacked and bonded again in this order to form a third laminate, the third laminate is wrapped and covered with two sets of upper and lower polyurethane films, the interior is evacuated, and the laminate is placed in an autoclave for high-temperature pressure treatment, and the polyurethane film, the second curved glass platen, the Teflon film, the buffer adhesive layer, and the Teflon film are removed in turn after exiting the autoclave to finally form a hyperbolic glass display.

[0008] Preferably, the thickness of the first curved glass platen and the second curved glass platen are both 4-6 mm, the four sides of the first curved glass platen protrude from the outer edge of the OLED display screen by 0-10 mm, and the four sides of the second curved glass platen protrude from the outer edge of the OLED display screen by 0-2 mm.

[0009] Preferably, the first film adhesive layer, the second film adhesive layer and the third film adhesive layer are all selected from one of PVB, EVA, PU and TPU.

[0010] Preferably, the first curved glass pressing plate, the second curved glass pressing plate, the first curved glass substrate and the second curved glass substrate are all tempered glass or silicate clear glass.

[0011] Preferably, the high temperature pressurization treatment of the first stack is specifically as follows: heating to 50°C and pressurizing to 0.1Mpa at the same time, maintaining for 30 minutes, then heating to 80°C and pressurizing to 0.5Mpa, maintaining for 30 minutes, continuing to heat to 110°C, pressurizing to 1.2Mpa, maintaining for 90 minutes, subsequently cooling to 20°C, maintaining for 50 minutes, reducing the pressure to 0Mpa and opening the autoclave, wherein the heating frequency is 1°C / minute, and the cooling frequency is 1°C / minute.

[0012] Preferably, the high temperature pressurization treatment of the third stack is specifically as follows: heating to 40°C and pressurizing to 0.1Mpa at the same time, maintaining for 30 minutes, then heating to 60°C and pressurizing to 0.5Mpa, maintaining for 30 minutes, continuing to heat to 90°C, pressurizing to 1.2Mpa, maintaining for 240 minutes, subsequently cooling to 25°C, maintaining for 50 minutes, reducing the pressure to 0Mpa and opening the autoclave, wherein the heating frequency is 2°C / minute, and the cooling frequency is 1.2°C / minute.

[0013] Preferably, the specific operation of internal vacuuming of the first stack and the third stack is: vacuum extraction is performed under an environment where the temperature is controlled at 15-30°C and the humidity is ≤55%, the vacuum pressure is controlled at 0.08-0.1Mpa, and the vacuum extraction time is 4-10 hours.

[0014] Preferably, the buffer layer is made of silicone.

[0015] Preferably, the curvature of the first deformation tool is half of that of the second curved glass substrate, and the curvature of the second deformation tool is the same as that of the second curved glass substrate.

[0016] Preferably, in preparing the second laminate, the first isothermal deformation treatment temperature is 60-110° C., the isothermal time is 4-16 hours, and the second isothermal deformation treatment temperature is 80-110° C., the isothermal time is 4-16 hours.

[0017] In summary, the beneficial effects of the present invention are as follows: the adhesive layer and the OLED display screen are separated for lamination production by a step-by-step method, the adhesive layer is first fixed, and when the OLED display screen is laminated, an adhesive buffer layer is added between the OLED display screen and the pressing plate to reduce the pressure, thereby reducing the defective rate of display screen breakage during production and improving the yield rate. DETAILED DESCRIPTION

[0018] The specific implementation manner of the present invention is further described below, and this embodiment does not constitute a limitation of the present invention.

[0019] A method for laminating a hyperbolic glass display screen comprises the following steps: Prepare the first laminate: stack and bond the first curved glass substrate, the first film adhesive layer, the second curved glass substrate, the second film adhesive layer, the Teflon film, the nylon mesh, and the first curved glass pressing plate in sequence, and then cover and wrap the laminate with two sets of upper and lower polyurethane films and evacuate the interior. The polyurethane film needs to be cut according to the size of the laminate, and the cutting size is 300-800 mm longer than the length of the laminate and 200-500 mm wider than the width of the laminate. A sealing tape is affixed to one side of the polyurethane film to completely seal the laminate to form a closed space, and the laminate is placed in an autoclave for high-temperature pressure treatment. After the laminate is taken out of the autoclave, the polyurethane film, the glass pressing plate, the nylon mesh and the Teflon film are removed in sequence to obtain the first laminate, wherein the Teflon film and the nylon mesh are 50 mm-100 mm longer than the first curved glass pressing plate. After the stacking is completed in sequence, the excess parts of the Teflon film and the nylon mesh need to be turned over and covered on the upper surface of the first curved glass pressing plate and fixed. Preparing a deformation tool: preparing two sets of a first deformation tool and a second deformation tool according to the curvature of the second curved glass substrate; Preparation of the second laminate: stacking and laminating in the order of the first deformation tooling, the buffer layer, the Teflon film, the third film adhesive layer, the OLED display, the Teflon film, the buffer layer, and the first deformation tooling, the buffer layer and the first deformation tooling are of the same size, the Teflon film size needs to exceed the first deformation tooling by 50-60mm, and then the first constant temperature deformation treatment is performed, and after the first deformation tooling is removed, the two sides are fixed by the second deformation tooling to obtain the second laminate, and the first deformation tooling, the second deformation tooling and the OLED displaying are of the same size; Prepare the third laminate: stack and bond the first laminate, the second laminate, the Teflon film, the buffer layer, the Teflon film, and the second curved glass platen in this order to form a third laminate. The size of the buffer layer is consistent with the size of the OLED display screen. The inner and outer surfaces of the buffer layer need to be wrapped with Teflon film for later removal. The third laminate is wrapped and covered with two sets of upper and lower polyurethane films and the interior is vacuumed. The polyurethane film needs to be cut according to the size of the laminate. The cutting size is 300-800mm longer than the length of the laminate and 200-500mm wider than the width of the laminate. One side of the polyurethane film is affixed with sealing tape for complete sealing to form an enclosed space, which is placed in an autoclave for high-temperature pressure treatment. After exiting the autoclave, the polyurethane film, the second curved glass platen, the Teflon film, the buffer bonding layer and the Teflon film are removed in turn to finally form a hyperbolic glass display screen.

[0020] The thickness of the first curved glass platen and the second curved glass platen are both 4-6mm. The four sides of the first curved glass platen protrude from the outer edge of the OLED display screen by 0-10mm, and the four sides of the second curved glass platen protrude from the outer edge of the OLED display screen by 0-2mm.

[0021] The first film adhesive layer, the second film adhesive layer and the third film adhesive layer are all selected from one of PVB, EVA, PU and TPU.

[0022] The first curved glass pressing plate, the second curved glass pressing plate, the first curved glass substrate and the second curved glass substrate are all tempered glass or silicate white glass.

[0023] The high temperature pressurization treatment of the first stack is specifically as follows: heating to 50°C and pressurizing to 0.1Mpa at the same time, maintaining for 30 minutes, then heating to 80°C and pressurizing to 0.5Mpa, maintaining for 30 minutes, continuing to heat to 110°C, pressurizing to 1.2Mpa, maintaining for 90 minutes, subsequently cooling to 20°C, maintaining for 50 minutes, reducing the pressure to 0Mpa and opening the autoclave, wherein the heating frequency is 1°C / minute, and the cooling frequency is 1°C / minute.

[0024] The high temperature pressurization treatment of the third stack is specifically as follows: heating to 40°C and pressurizing to 0.1Mpa at the same time, maintaining for 30 minutes, then heating to 60°C and pressurizing to 0.5Mpa, maintaining for 30 minutes, continuing to heat to 90°C, pressurizing to 1.2Mpa, maintaining for 240 minutes, subsequently cooling to 25°C, maintaining for 50 minutes, reducing the pressure to 0Mpa and opening the autoclave, wherein the heating frequency is 2°C / minute, and the cooling frequency is 1.2°C / minute.

[0025] The specific operation of internal vacuuming of the first stack and the third stack is: vacuum extraction is performed under an environment in which the temperature is controlled at 15-30°C and the humidity is ≤55%, the vacuum pressure is controlled at 0.08-0.1Mpa, and the vacuum extraction time is 4-10 hours.

[0026] The buffer layer is made of silicone.

[0027] The curvature of the first deformation tool is half of that of the second curved glass substrate, and the curvature of the second deformation tool is the same as that of the second curved glass substrate.

[0028] In preparing the second laminate, the first isothermal deformation treatment temperature is 60-110° C., the isothermal time is 4-16 hours, and the second isothermal deformation treatment temperature is 80-110° C., the isothermal time is 4-16 hours.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be deemed to fall within the protection scope of the technical solution of the present invention.

Claims

1. A method for laminating a hyperbolic glass display screen, characterized in that: The steps include: Prepare a first laminate: stack and bond the first curved glass substrate, the first film adhesive layer, the second curved glass substrate, the second film adhesive layer, the Teflon film, the nylon mesh, and the first curved glass pressing plate in order, then cover and wrap the first curved glass substrate with two sets of polyurethane films, evacuate the interior, place the laminate in an autoclave under high temperature and pressure, and remove the polyurethane film, the glass pressing plate, the nylon mesh, and the Teflon film in order after exiting the autoclave to obtain a first laminate; Preparing a deformation tool: preparing two sets of a first deformation tool and a second deformation tool according to the curvature of the second curved glass substrate; Preparing a second laminate: laminating and bonding the first deformation tooling, the buffer layer, the Teflon film, the third film adhesive layer, the OLED display, the Teflon film, the buffer layer, and the first deformation tooling in sequence, and subsequently performing a first constant temperature deformation treatment, removing the first deformation tooling, and bonding and fixing the two sides with the second deformation tooling to obtain a second laminate; Preparation of the third laminate: The first laminate, the second laminate, the Teflon film, the buffer layer, the Teflon film, and the second curved glass platen are stacked and bonded again in this order to form a third laminate, the third laminate is wrapped and covered with two sets of upper and lower polyurethane films, the interior is evacuated, and the laminate is placed in an autoclave for high-temperature pressure treatment, and the polyurethane film, the second curved glass platen, the Teflon film, the buffer adhesive layer, and the Teflon film are removed in turn after exiting the autoclave to finally form a hyperbolic glass display.

2. The method for laminating a hyperbolic glass display screen according to claim 1, characterized in that: The thickness of the first curved glass platen and the second curved glass platen are both 4-6 mm, the four sides of the first curved glass platen protrude from the outer edge of the OLED display screen by 0-10 mm, and the four sides of the second curved glass platen protrude from the outer edge of the OLED display screen by 0-2 mm.

3. The method for laminating a hyperbolic glass display screen according to claim 1, characterized in that: The first film adhesive layer, the second film adhesive layer and the third film adhesive layer are all selected from one of PVB, EVA, PU and TPU.

4. The method for laminating a hyperbolic glass display screen according to claim 1, characterized in that: The first curved glass pressing plate, the second curved glass pressing plate, the first curved glass substrate and the second curved glass substrate are all tempered glass or silicate clear glass.

5. The method for laminating a hyperbolic glass display screen according to claim 1, characterized in that: The high temperature pressurization treatment of the first stack is specifically as follows: heating to 50°C and pressurizing to 0.1Mpa at the same time, maintaining for 30 minutes, then heating to 80°C and pressurizing to 0.5Mpa, maintaining for 30 minutes, continuing to heat to 110°C, pressurizing to 1.2Mpa, maintaining for 90 minutes, subsequently cooling to 20°C, maintaining for 50 minutes, reducing the pressure to 0Mpa and opening the autoclave, wherein the heating frequency is 1°C / minute, and the cooling frequency is 1°C / minute.

6. The method for laminating a hyperbolic glass display screen according to claim 1, characterized in that: The high temperature pressurization treatment of the third stack is specifically as follows: heating to 40°C and pressurizing to 0.1Mpa at the same time, maintaining for 30 minutes, then heating to 60°C and pressurizing to 0.5Mpa, maintaining for 30 minutes, continuing to heat to 90°C, pressurizing to 1.2Mpa, maintaining for 240 minutes, subsequently cooling to 25°C, maintaining for 50 minutes, reducing the pressure to 0Mpa and opening the autoclave, wherein the heating frequency is 2°C / minute, and the cooling frequency is 1.2°C / minute.

7. The method for laminating a hyperbolic glass display screen according to claim 1, characterized in that: The specific operation of internal vacuuming of the first stack and the third stack is: vacuum extraction is performed under an environment in which the temperature is controlled at 15-30°C and the humidity is ≤55%, the vacuum pressure is controlled at 0.08-0.1Mpa, and the vacuum extraction time is 4-10 hours.

8. The method for laminating a hyperbolic glass display screen according to claim 1, characterized in that: The buffer layer is made of silica gel.

9. The method for laminating a hyperbolic glass display screen according to claim 1, characterized in that: The curvature of the first deformation tool is half of that of the second curved glass substrate, and the curvature of the second deformation tool is the same as that of the second curved glass substrate.

10. The method for laminating a hyperbolic glass display screen according to claim 1, characterized in that: In preparing the second laminate, the first isothermal deformation treatment temperature is 60-110° C., the isothermal time is 4-16 hours, and the second isothermal deformation treatment temperature is 80-110° C., the isothermal time is 4-16 hours.