CN110928454A - Touch display module with three-dimensional touch points and production method thereof - Google Patents
Touch display module with three-dimensional touch points and production method thereof Download PDFInfo
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- CN110928454A CN110928454A CN201911346713.2A CN201911346713A CN110928454A CN 110928454 A CN110928454 A CN 110928454A CN 201911346713 A CN201911346713 A CN 201911346713A CN 110928454 A CN110928454 A CN 110928454A
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
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Abstract
The invention relates to a touch display module with a three-dimensional touch point and a production method thereof, wherein the touch display module comprises a glass cover plate, an adhesive light-transmitting adhesive layer, ITO glass, a full-lamination adhesive layer and a display screen, wherein the adhesive light-transmitting adhesive layer is arranged between the glass cover plate and the ITO glass, the full-lamination adhesive layer is arranged between the ITO glass and the display screen, the glass cover plate, the adhesive light-transmitting adhesive layer, the ITO glass, the full-lamination adhesive layer and the display screen are stacked together from top to bottom to form the touch display module, the glass cover plate is provided with a touch top surface and an adhesive bottom surface, the touch top surface and the adhesive bottom surface are parallel to each other, a plurality of three-dimensional touch areas are arranged on the touch top surface, and the three-dimensional touch areas are positioned right above the ITO glass.
Description
Technical Field
The present invention relates to a touch display module and a method for manufacturing the same, and more particularly, to a touch display module with a three-dimensional touch point and a method for manufacturing the same.
Background
The touch screen display can enable a user to operate the host machine only by lightly touching icons or characters on the computer display screen with fingers, so that the operation of a keyboard and a mouse is avoided, the man-machine interaction is more straightforward, the touch screen display is mainly applied to hall information query in public places, leadership office, electronic games, song and dish ordering, multimedia teaching, air ticket/train ticket pre-sale and the like, and products are mainly classified into a capacitive touch screen, a resistive touch screen and a surface acoustic wave touch screen.
The touch display part of the existing touch screen display is flat, but when the touch screen display is in blind operation, the touch screen display does not have any guiding function on fingers of a user, the user often cannot accurately press a corresponding control button, and a large amount of error operations occur, so that the touch screen display is very inconvenient to use and has the main defect of the traditional technology.
Disclosure of Invention
The technical scheme adopted by the invention is as follows: a production method of a touch display module with a three-dimensional touch point comprises the following steps: the first step is as follows: glass substrate inspection, second step: coating protective films on the front and back surfaces of the glass substrate, and the third step: cutting and blanking the glass substrate, and cutting into small pieces to obtain the glass cover plate, wherein the fourth step is as follows: CNC forming is carried out on the cut glass cover plate in the third step, concave touch points are manufactured by using a grinding head, and the forming of the concave touch points mainly comprises the following steps: CNC CNC engraving and sweeping, have certain touch-control in order to guarantee to feel, combine the thickness of glass substrate, under the condition of preferred assurance glass intensity, the depth control of recessed touch-control point does, glass apron thickness is 1.8mm to 2.0mm, the degree of depth of recessed touch-control point is 0.5mm, glass apron thickness is 1.1mm, the degree of depth of recessed touch-control point is 0.35mm, glass apron thickness is 0.7mm, the degree of depth of recessed touch-control point is 0.25mm, the fifth step: cleaning the glass cover plate, and the sixth step: and (5) inspecting the glass cover plate, and a seventh step: glass apron tempering carries out chemical tempering in advancing the tempering furnace with the glass apron of the good outward appearance of inspection, and the tempering condition sets up at 420 degrees centigrade 6 hours, and the DOL value that the tempering goes out is at 8~11um, and the CS value is at 420~450mPa, and the surface hardness reaches 7H, the eighth step: cleaning the glass cover plate, and the ninth step: printing black ink once, and the tenth step: baking the glass cover plate at the baking temperature of 180 ℃ for 4 minutes, and performing the tenth step: printing secondary black ink, and a twelfth step: baking the glass cover plate at the baking temperature of 180 ℃ for 4 minutes, and performing a thirteenth step: printing white ink, and a fourteenth step: and baking the glass cover plate at the baking temperature of 160 ℃ for 20-25 minutes.
The utility model provides a touch display module from three-dimensional touch-control point of taking, it includes the glass apron, bonding printing opacity glue film, ITO glass, laminate glue film and display screen entirely, wherein, this bonding printing opacity glue film sets up between this glass apron and this ITO glass, this laminate glue film sets up between this ITO glass and this display screen entirely, this glass apron, this bonding printing opacity glue film, this ITO glass, this laminate glue film entirely and this display screen top-down fold together and form this touch display module, this glass apron has touch-control top surface and bonding bottom surface, this touch-control top surface is parallel to each other with this bonding bottom surface, be provided with a plurality of three-dimensional touch-control regions on this touch-control top surface, this three-dimensional touch-control region is in directly over this ITO glass.
The invention has the beneficial effects that: the invention provides clearer and more accurate three-dimensional touch experience, and the integrated touch screen provides stronger visual enjoyment for consumers after being assembled, and has stronger and more accurate touch sense. The glass cover plate used conventionally can achieve the three-dimensional effect as the thickness of 0.7mm, 1.1mm and 2.0mm, and the traceability of the product is greatly improved.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
A production method of a touch display module with a three-dimensional touch point comprises the following steps.
The first step is as follows: and (5) inspecting the glass substrate.
The method comprises the steps that appearance inspection is carried out on a large glass substrate after the large glass substrate is fed, an inspection table and a table lamp of a three-primary-color lamp tube are used, comparison inspection gauges are used for checking whether white points, black points, scratches, broken filaments, concave and convex points and the like meet feeding inspection specifications during appearance inspection, the size is measured by using a strip ruler, the size of the original glass is generally 1120mm 1140mm, 920mm 1120mm, 1092mm 1244mm and the like, brands are different, and the sizes of the fed materials are different; and the thickness is measured by a caliper or a thickness gauge, and the incoming material is sent to the next procedure for processing after being inspected to be qualified.
The second step is that: and coating protective films on the front and back surfaces of the glass substrate.
After the large pieces of supplied base glass are qualified by checking the appearance, the size, the thickness, the transmittance and the like, the base glass is manually placed on a rolling shaft of a laminating machine by using a semi-automatic laminating machine, protective films are automatically coated on the front side and the back side of the glass by the laminating machine, no bubbles are needed to be ensured and the glass is smooth, and then the protective films are manually cut off and sent to the next process.
The step is to protect the substrate glass from being scratched, pricked and scratched by glass chips, reduce foreign matter pollution and improve the production yield of products, glass chips are generated inevitably after glass cutting, the chips can cause the defects of scratching, pricking and the like of the glass substrate, the defects of scratching and pricking are the largest bad items in the glass processing industry, and the production reject ratio can be greatly reduced after the measure is taken, so that the production cost is saved.
The third step: and cutting the glass substrate into pieces to obtain the glass cover plate.
The glass substrate that the positive and negative was covered the protection film is cut into required size with the break bar (arrange the version in the software of cutting machine according to required size, automatic cutout becomes required size), the problem that should pay attention to at the in-process of cutting, firstly the utilization ratio maximize of typesetting reduces extravagantly, secondly the size of cutting will be unified, be favorable to the manufacturing of back end process, precision when guaranteeing the CNC edging also fixes a position through the tool because of the CNC board.
The size of the blanking is generally increased by 0.5mm on one side compared with the size actually processed, and the 0.5mm is the size to be cut and ground by CNC.
When concrete implementation, will choose the break bar of different angles according to glass's thickness for use, the glass thickness that generally is commonly used is 0.55mm, 0.7mm, 1.1mm, 1.8mm, 2.0mm, so 120 degrees ~135 degrees can be selected to the break bar angle, and the life of break bar also needs the management and control, when the cutting is sharp not and can produce when collapsing the limit, just should in time change the break bar, ensures that the effect of cutting out is qualified.
The fourth step: and C, performing CNC (computer numerical control) molding on the cut glass cover plate in the third step, and manufacturing concave touch points by using a grinding head.
The method comprises the steps of compiling a processing program in numerical control programming software in advance, setting parameters such as cutter parameters, spindle rotating speed, feed rate, cutter lifting speed, processing path, reference height and feed amount of each processing, tearing off protective films on the front and back surfaces of the cut small glass, placing the glass in a jig, locating the position, leading in a CNC processing program compiled in advance through processing software in a CNC machine, firstly carrying out tool setting, carrying out CNC forming after setting various processing parameters according to a CNC parameter table, wherein the rotating speed can be generally set to be about 36000, the feed speed can be generally set to be about 1300, and the feed speed can be adjusted according to actual processing conditions.
According to the size and radian of the touch point to be processed, the CNC grinding head is customized, the relevant size of the touch point is processed through the grinding head, so the design size of the CNC grinding head is very important, the CNC grinding head can be adjusted according to the effect of actual CNC, and the quality of the design of the CNC grinding head determines the success or failure of processing the touch point, which is of great importance.
The fourth step is that the appearance and the touch point position of the cover plate are processed together, because of the glass product, the processed edge is sharper, and the glass product is required to be polished and polished, namely, the edge of the straight edge is inverted into a round edge, so that the hand cannot be injured, and after the glass product is polished, the edge can be repaired even if the edge is slightly sand-collapsed, so that the strength of the glass can be effectively improved.
The forming of the touch points mainly comprises: CNC CNC engraving and milling adds and sweeps light, has certain touch-control in order to guarantee to feel, combines glass substrate's thickness, and under the condition of priority assurance glass intensity, the degree of depth of touch-control point generally has: milling down 0.5mm in the thickness of 1.8mm or 2.0mm conventionally; glass with a thickness of 1.1mm is milled down by 0.35 mm; a 0.7mm thick will be milled down to 0.25 mm.
The main bad items of CNC shaping management and control are sand collapse edge, scratch, puncture, structure size and the like, and the abnormal shape in the aspect of size is measured by using quadratic element and cubic element.
The fifth step: and cleaning the glass cover plate.
Because the cutting fluid is added for cooling and lubricating during CNC machining, the glass formed by CNC is subjected to ultrasonic cleaning, oil stains, the cutting fluid, dirt and the like on the surface of the glass are removed, and the yield of the next machining is improved.
The baking section is set to be at the temperature of 80 +/-5 degrees during ultrasonic cleaning, drying is guaranteed, watermarks cannot be generated, inspection is carried out after cleaning, white dots and watermarks are mainly controlled, and the requirement of a back-end procedure can be met by the effect after cleaning.
And a sixth step: and (5) inspecting the glass cover plate.
The cleaned white glass cover plate needs to be subjected to appearance inspection, defective products are prevented from flowing into the next process, materials and working hours are wasted, and with the aid of a tricolor table lamp and an inspection bench, poor appearance items of inspection mainly comprise white spots, scratches, mouth breakage and the like.
The seventh step: and (5) tempering the glass cover plate.
The glass cover plate with the checked appearance is placed into the material rack one by one, then placed into the toughening furnace for chemical toughening, the general toughening condition is set at 420 ℃ for 6 hours, the toughening parameters can be different according to the brand difference of the base material glass, the DOL value of the conventional toughened glass is 8-11 um, the CS value is 420-450 mPa, and the surface hardness can reach 7H.
Eighth step: and (5) cleaning the glass cover plate.
As the white glass is put into the chemical solution for soaking in the toughening process, the toughened glass needs to be subjected to ultrasonic cleaning to remove the chemical solution, dirt and the like on the surface of the glass, so that the yield of the next processing is improved.
The baking section is set to be at the temperature of 80 +/-5 degrees during ultrasonic cleaning, drying is guaranteed, watermarks cannot be generated, inspection is carried out after cleaning, white dots and watermarks are mainly controlled, and the requirement of a back-end procedure can be met by the effect after cleaning.
The ninth step: printing black ink once.
The toughened glass cover plate is printed with ink, the conventional method is to print black bottom and key white, firstly, the designed pattern is photopatterned, the pattern is transferred to the upper surface of a film, then photosensitive glue is coated on a silk-screen polyester screen plate, the photosensitive glue is baked, then the film is pasted on the photosensitive glue, and the film is exposed by a plate drying machine, and the pattern is transferred to the silk-screen plate again.
And placing the glass cover plate on the table board of a printer, printing the other side of the touch point upwards, adjusting the printer according to the printing parameter table, transferring the required pattern onto the glass by screen printing, and selecting 420 meshes as the mesh number of the screen.
The tenth step: and (5) baking the glass cover plate.
After the black ink is printed for one time, the glass is placed into a tunnel furnace by a manipulator to be baked, the purpose is to bake the black ink, the temperature and the time are set according to the length of the tunnel furnace, the temperature and the time can be set at 180 ℃ for 4 minutes conventionally, and the step is only used for mounting and drying, so that the ink is prevented from being stuck on a machine table or a screen plate.
The eleventh step: printing secondary black ink.
Printing a second black ink, namely, in order to increase the shielding property of the ink and fill up the empty points of individual ink pinholes of the first black ink, placing a glass cover plate printed with the first black ink on the table top of a printing machine, adjusting the printing machine according to a printing parameter table, and transferring a required secondary black pattern onto the glass by screen printing, wherein the screen mesh number can be 420 meshes or 350 meshes.
The twelfth step: and (5) baking the glass cover plate.
After the secondary black ink is printed, the glass is placed into a tunnel furnace by a manipulator to be baked, the black ink is baked, the temperature and the time are set according to the length of the tunnel furnace, the temperature and the time can be set at 180 ℃ for 4 minutes conventionally, and the step is only used for mounting and drying to prevent the ink from being stuck on a machine table or a screen plate.
The thirteenth step: printing white ink.
Printing key white ink again, printing the white ink at the primary black and secondary black hollow places, printing the key pattern, putting the glass printed with the secondary black on the table board of the printer, adjusting the printer according to the printing parameter table, and transferring the required white pattern onto the glass by screen printing, wherein the mesh number of the screen can be 420 meshes or 350 meshes.
The fourteenth step is that: and (5) baking the glass cover plate.
Because the printing of the ink is completed for three times, in order to completely dry the ink, the printed glass is taken into a baking oven to be baked at high temperature for a long time, the adhesive force of the ink is ensured, the baking condition is set to be 160 ℃ for 20-25 minutes, and the adhesive force of the ink is measured after baking, and the test of a hundred grids is required.
After the ink is baked, a hundred-grid test is carried out, a hundred-grid blade is used for scribing a plurality of 45-degree oblique lines on the ink, a 45-degree line grid is combined, a 3M810 test adhesive tape is adhered on the grid, after the test adhesive tape is pushed flatly, the test adhesive tape is torn at a constant speed at a 45-degree angle, the ink in the grid does not fall off, namely, the adhesive force of the ink is qualified, the baked cover plate is inspected for appearance, and the cover plate is to be attached after being qualified.
The fifteenth step: processing sensor circuit glass, printing an etching paste pattern on the back surface of the ITO glass, printing the etching paste pattern on the back surface of the ITO double-sided conductive glass qualified in material inspection by using an inclined arm type semi-automatic printing machine, then baking, etching the unnecessary ITO conductive part below the etching paste after baking is finished, and only reserving the ITO conductive layer without the etching paste.
The mesh number of the screen printing plate is 350 meshes, the thickness of the screen printing plate is 8-10 mu, the hardness of the scraper is 80 degrees, the angle of the scraper is 15-20 degrees, the inclination of the scraper is 0-15 degrees, the pressure of the scraper is 2-3 kg, the speed of the scraper is 5-6 m/min, the off-plate height is 3.5-4 mm, and the printing thickness is 12-20 mu.
The baking condition is 135 ℃ for 40 minutes, the baking only accelerates the reaction of the etching paste to ensure the etching is clean, and the baking can not bake the etching paste ink.
Sixteenth, step: printing the etching paste pattern of the front side.
And reversely printing the ITO glass printed with the back etching paste ink on the front side by using a bevel arm type semi-automatic printing machine, and then baking, wherein the mesh number of the screen plate is 350 meshes, the thickness of the screen plate is 8-10 mu, the hardness of a scraper is 80 degrees, the angle of the scraper is 15-20 degrees, the inclination of the scraper is 0-15 degrees, the pressure of the scraper is 2-3 kg, the speed of the scraper is 5-6 m/min, the off-plate height is 3.5-4 mm, and the printing thickness is 12-20 mu.
The baking condition is 135 ℃ for 40 minutes, the baking only accelerates the reaction of the etching paste to ensure the etching is clean, and the baking can not bake the etching paste ink.
Seventeenth step: printing the front protective glue ink.
Printing protective glue ink on the front surface of the ITO double-sided conductive glass with the patterns manufactured in the sixteenth step, and then mounting the ITO double-sided conductive glass by using an IR tunnel furnace after printing, wherein the protective glue ink is printed to protect a visible area of a product from being polluted, scratched, damaged and the like; meanwhile, the protective glue ink is printed outside the visible area so as to ensure the cleanliness of glass when the silver paste ink is printed in the next procedure, thereby ensuring the adhesive force of the silver paste ink.
The printing conditions were: the screen mesh number is 200 meshes, the screen film thickness is 20-28 mu, the scraper hardness is 80 degrees, the scraper angle is 20-25 degrees, the scraper inclination is 0-15 degrees, the scraper pressure is 2-3 kg, the scraper speed is 2-8 m/min, the off-plate height is 3-4 mm, and the printing thickness is 20-30 mu.
The baking conditions of the IR tunnel furnace are set as follows: and the temperature is 240 ℃, 3.0-5.0 m/min, the equipment is preheated for 15-20 min after being started to reach the set temperature, the operation can be carried out, and the energy of the IR furnace only needs to ensure that the protective glue ink can be mounted and dried and cannot be pasted on a screen printing plate, a machine table and the like.
And eighteenth step: and printing the back protective glue ink.
And (3) reversing the ITO double-sided conductive glass printed with the front protective adhesive in the seventeenth step to print the protective adhesive ink on the back, and baking the ITO double-sided conductive glass in a baking oven, wherein the printing conditions are as follows: the screen mesh number is 200 meshes, the screen film thickness is 20-28 mu, the scraper hardness is 80 degrees, the scraper angle is 20-25 degrees, the scraper inclination is 0-15 degrees, the scraper pressure is 2-3 kg, the scraper speed is 2-8 m/min, the off-plate height is 3-4 mm, and the printing thickness is 20-30 mu.
Baking conditions: the baking oven is used for baking the protective glue printed on the front side and the back side together at 160 ℃ for 20 minutes, so that the protective glue is convenient to wipe and tear in the following procedures.
The nineteenth step: and printing a front silver paste circuit layer.
And (4) printing front silver paste line ink on the ITO double-sided conductive glass printed with the front and back side protective glue in the eighteenth step so as to lead out the front ITO lines in the visible area through the silver paste lines.
The printing conditions were: the screen mesh number is 420 meshes, the screen film thickness is 8-10 mu, the scraper hardness is 80 degrees, the scraper angle is 20-25 degrees, the scraper inclination is 0-15 degrees, the scraper pressure is 2-3 kg, the scraper speed is 3-8 m/min, the off-plate height is 3-3.5 mm, and the printing thickness is 8-12 mu.
Baking conditions: at 160 ℃ for 10 minutes, only drying, and baking together when baking is finished after the next silver paste printing.
The twentieth step: and printing a back silver paste circuit layer.
And printing the ITO double-sided conductive glass printed with the front silver paste line in the nineteenth step, and printing back silver paste line ink in turn, wherein the back silver paste ink is printed to lead out the back ITO line in the visible area through the silver paste line.
The printing conditions were: the screen mesh number is 420 meshes, the screen film thickness is 8-10 mu, the scraper hardness is 80 degrees, the scraper angle is 20-25 degrees, the scraper inclination is 0-15 degrees, the scraper pressure is 2-3 kg, the scraper speed is 3-8 m/min, the off-plate height is 3-3.5 mm, and the printing thickness is 8-12 mu.
Baking conditions: and (3) completely baking the silver paste printing ink on the front side and the back side at 160 ℃ for 50 minutes at one time, and ensuring the adhesive force and the contact resistance.
After the silver paste is baked, a hundred-grid test is carried out, a plurality of 45-degree oblique lines are scribed on the silver paste by a blade to form a 45-degree line grid, then a 3M810 test adhesive tape is adhered on the grid, after the silver paste is pushed flatly by force, the test adhesive tape is torn at a constant speed at a 45-degree angle, and the silver paste in the grid does not fall off, namely, the adhesive force of the silver paste on the glass is qualified.
The twentieth step: printing a front insulating protective layer.
And printing the front insulating ink on the ITO glass printed with the front and back silver paste ink in the twentieth step to play a role in protecting the front silver paste ink and prevent the front silver paste ink from being oxidized, scratched, corroded and the like.
The printing conditions were: the mesh number of the screen printing plate is 420 meshes, the thickness of the screen printing plate is 8-10 mu, the hardness of a scraper is 80 degrees, the angle of the scraper is 15-20 degrees, the inclination of the scraper is 0-15 degrees, the pressure of the scraper is 2-3 kg, the speed of the scraper is 4-10 m/min, the height from the screen printing plate is 3-4 mm, the printing thickness is 8-12 mu, and the mesh number is selected to be a high-mesh screen printing plate so as to reduce the thickness of printing ink and prevent poor bubble generation easily when a PET panel is adhered.
Baking conditions: at 130 ℃ for 10 minutes, only drying, and baking together when baking is finished after the next silver paste printing.
A twenty-second step: printing a back insulating protective layer.
And printing the ITO glass with the front insulating ink in the twenty-first step, and printing the back insulating ink in turn to play a role in protecting the back silver paste ink and prevent the back silver paste ink from being oxidized, scratched, corroded and the like.
The printing conditions were: the mesh number of the screen printing plate is 300 meshes, the thickness of the screen printing plate is 8-10 mu, the hardness of a scraper is 80 degrees, the angle of the scraper is 15-20 degrees, the inclination of the scraper is 0-15 degrees, the pressure of the scraper is 2-3 kg, the speed of the scraper is 4-10 m/min, the off-plate height is 3-4 mm, and the printing thickness is 9-13 mu.
Baking conditions: and (4) completely baking the insulating ink on the front side and the back side at 130 ℃ for 30 minutes at one time.
After the insulation baking is finished, a hundred-grid test is carried out, a plurality of 45-degree oblique lines are scribed on the insulation by a blade to form a 45-degree line grid, a 3M810 test adhesive tape is adhered on the grid, after the test adhesive tape is pushed flatly by force, the test adhesive tape is torn at a constant speed at a 45-degree angle, the insulation in the grid does not fall off, and the adhesion force of the insulation on the silver paste is qualified.
The twenty-third step: the large piece of glass is cut into small pieces.
And conveying the large double-sided ITO conductive glass which completes all the printing procedures in the twenty-second step to cutting, and cutting the large glass into small pieces with required sizes and shapes by adopting a cutter wheel.
The cutter wheel adopts a 120-degree disk alloy cutter with the diameter of 2.5X 0.8X 0.65mm, the speed is 8-9 (10 m/min), the pressure P1\ P2 adopts 0.17 +/-0.05 MPa, the descending height of the cutter wheel is 4.95 +/-0.3 mm, and the glass cutting effect is based on that glass is slightly broken by hands during splitting and the glass is regularly broken.
The twenty-fourth step: and pre-pasting ACF on the front and back sides.
Sending the ITO glass (sensor for short) cut into small pieces in the twenty-third step to a binding process, pre-sticking ACF with the thickness of 25 mu and the width of 1.5mm on the front surface of the sensor by using a pre-pressing machine, sticking the ACF on the FPC pressing gold finger, and sticking the ACF on the windowing position of the FPC copper foil in the middle; and the ACF on the back is pre-pasted in turn.
The parameters of the prepress were set as: temperature: 165-210 ℃, pressure: 2.0-4.0 Mpa, speed: 0.1 to 0.6 mm/s.
The ACF is pasted for connecting and conducting the silver paste circuit with the FPC used in the next procedure.
Twenty-fifth step: and binding the FPC.
And (4) manually aligning the glass sensor with ACF pasted on the front and back surfaces in the twenty-fourth step by using an FPC, then taking the glass sensor to the pulse hot press for binding, namely connecting and conducting the FPC and a silver paste circuit on the glass sensor through the ACF, and finally inserting the FPC into a TP connector on the mainboard during installation.
And setting the binding parameters of the pulse hot press.
After hot pressing, glue is applied to the joint of the FPC and the circuit to fix the FPC and prevent the FPC from being damaged by pulling or cutting.
After the FPC is bound, testing the tension by using an FPC tension tester: applying 500 grams of force in the direction vertical to 90 degrees to ensure that the film cannot be peeled off; applying 1000 gram force in the horizontal 180-degree direction to obtain a qualified product.
Twenty-sixth step: and (6) function detection.
And (3) connecting the glass sensor bound with the FPC in the twenty-fifth step to a computer through an IC development board, then entering a mass production test mode through mass production test software to detect whether the data of each channel is normal or not, carrying out scribing test after the data is qualified, and seeing whether the line is displayed normally or not, wherein a square opening can be drawn generally, and then drawing an X to detect the quality of the line.
Twenty-seventh step: and (5) cleaning.
And (4) carrying out pure water cleaning on the sensors qualified in the twenty-sixth step of function test to protect the cleanliness when entering the laminating process.
The twenty-eighth step: and cutting the SCA optical cement.
The SCA optical cement is sized by a blanking machine according to typesetting design, the blanking machine can work under the condition that the air pressure of the blanking machine reaches 5bar +/-1 of rated working pressure, the tension is controlled within the range of 0.7-0.85N, then the SCA layer is processed by die cutting, the position of a camera hole is left out so as to reduce height difference and increase light transmittance, appearance forming, punching and slotting are completed by one-time die cutting, and electrostatic dust removal is adopted after the die cutting.
Twenty-ninth step: and the ITO glass is attached to the SCA optical cement.
Carry out the chip laminating with the SCA that the sensor that rinses twenty-seventh step and the SCA that the twenty-eighth step is clean are glued, adopt the SCA rigging machine to carry out soft laminating to hard, put glass sensor on the platform that induced drafts down of rigging machine, the SCA of cross cutting good appearance is put to the platform that induced drafts on, tear respectively on the SCA layer gently from the positive protection of type membrane and glass sensor and glue, then laminate.
The bonding parameters were set as follows: 1) rubber roller time delay: 0.5 s; (2) film coating speed: 600-800 mm/s; (3) the running speed is as follows: 600-800 mm/s; (4) initial position of film covering: 25-40 mm; (5) film covering end position: 415-525 mm.
Thirty-fourth step: and the glass cover plate is pressed with the ITO glass.
After the lamination is finished, the product is aligned with the cover plate with the touch point by the jig, the aligned product is taken onto the SCA laminating machine for lamination, and the laminating conditions are set as follows.
The thirty-first step: removing bubbles and curing.
The reason for removing the bubbles after pressing is to remove the SCA bubbles by pressurizing and heating the small bubbles, and simultaneously, the SCA is flatly attached to the sensor glass to ensure the adhesion force, and the parameters for removing the bubbles are shown in the table below.
And (3) detecting whether bubbles are completely removed after the bubbles are removed, if the bubbles are not completely removed, carrying out secondary bubble removal, wherein the temperature is unchanged, the air pressure is increased by 1 kgf/cm, and the time is prolonged by 5-10 minutes, carrying out appearance wiping and detection on the bubble-removed product, tearing off the protective adhesive on the back surface of the glass sensor at the moment, carrying out appearance detection, wiping dirt and stains, detecting whether the appearance has defects such as scratches, pricking damage, ink penetration, tooth breakage, bubbles, impurities, black spots, white spots and the like, and carrying out front-back film covering on the good appearance.
The UV machine curing parameters are as follows: the speed of the conveyer belt is adjusted to be between 100 and 200; after starting the machine for 5 minutes, testing whether the energy of the machine reaches 2500mj by using an energy tester, and if not, slowing down the speed of the conveying belt.
A thirty-second step: and (6) detecting the function.
After appearance inspection, 100% function detection is carried out, the IC development board is connected to a computer, then, the productive test software is used for detecting whether the data of each channel is normal or not, a scribing test is carried out, whether the line display is normal or not is judged, the scribing test is carried out after the line display is qualified, whether the line display is normal or not is judged, a square shape can be drawn, and then an X is drawn to detect the quality of the circuit.
The thirty-third step: and an OCA layer is pasted on the back of the TP.
After the function of the TP is detected, firstly, a panel turnover machine is utilized to paste the OCA which is fully laminated on the back surface of the TP, the laminating speed is controlled to be 20-25 m/min, the pressure is controlled to be 0.1-0.2 kg, the cleanliness is controlled in the laminating process so as to avoid appearance damage, if the bubbles are small, the bubbles do not need to be removed, if the bubbles are large, the bubbles are removed for one time, and the layer of OCA is used for bonding the TP and the display module together.
And thirty-fourth step: TP and display module assembly laminate completely.
According to TP and display module's laminating position, the counterpoint tool of bakelite board has been designed, display module function test is qualified after, can laminate completely, put into counterpoint tool the inside earlier display module, tear off the type membrane of laminating OCA totally at the TP back again, put into counterpoint tool the inside with TP again, TP just adheres together with display module like this, take the assembly that adheres together at once to laminate totally the machine the inside and carry out the evacuation laminating, the pressfitting parameter sets for.
And thirty-fifth step: and (4) removing bubbles.
Remove the bubble after the laminating in order to eliminate the OCA bubble with the bubble through pressurization and heating, paste the OCA on display module assembly smoothly simultaneously, guarantee its planarization, remove the bubble parameter table as follows.
And (4) checking whether bubbles are completely removed after the bubbles are removed, and if the bubbles are not completely removed, performing secondary bubble removal.
Thirty-sixth step: and (5) checking the appearance and detecting the function.
After bubbles are removed, appearance inspection is firstly carried out, dirt and stains are wiped, whether defects such as scratches, stabbing, ink permeation, tooth breakage, bubbles, sundries, black spots, white spots and the like exist in the appearance is checked, front and back surface film covering is carried out on the appearance good product, the function of TP is detected firstly after the film covering is carried out, and then the function of the display module is detected.
As shown in fig. 1, a touch display module with a three-dimensional touch point includes a glass cover plate 10, an adhesive transparent adhesive layer 20, an ITO glass 30, a full-lamination adhesive layer 40, and a display screen 50, wherein the adhesive transparent adhesive layer 20 is disposed between the glass cover plate 10 and the ITO glass 30.
The full-lamination glue layer 40 is disposed between the ITO glass 30 and the display screen 50.
The adhesive transparent adhesive layer 20 is used for adhering the glass cover plate 10 and the ITO glass 30 together, and the full-lamination adhesive layer 40 is used for adhering the ITO glass 30 and the display screen 50 together.
The glass cover plate 10, the bonding transparent adhesive layer 20, the ITO glass 30, the full-lamination adhesive layer 40 and the display screen 50 are stacked together from top to bottom to form the touch display module.
In a specific implementation, the bonding transparent adhesive layer 20 is an SCA adhesive layer, and the full-bonding adhesive layer 40 is an OCA adhesive layer.
The glass cover plate 10 has a touch top surface 60 and an adhesive bottom surface 70, the touch top surface 60 and the adhesive bottom surface 70 are parallel to each other, a plurality of three-dimensional touch areas 80 are disposed on the touch top surface 60, and the three-dimensional touch areas 80 are located right above the ITO glass 30.
In the specific implementation, the three-dimensional touch area 80 is an outward convex touch point, and in the specific implementation, the three-dimensional touch area 80 is an inward concave touch point, and the inward concave touch point is concavely arranged in the glass cover plate 10.
The concave touch point includes a notch surface 81 and a groove inner surface 82, wherein the notch surface 81 is connected to the touch top surface 60, and the groove inner surface 82 is connected to the notch surface 81.
In particular embodiments, the groove inner surface 82 is provided with a display coating.
The display coating can display information such as button patterns, power supply opening marks and the like, so that a user can conveniently recognize the information. The glass cover plate used conventionally can achieve the three-dimensional effect as the thickness of 0.7mm, 1.1mm and 2.0mm, and the traceability of the product is greatly improved.
Claims (10)
1. A production method of a touch display module with a three-dimensional touch point is characterized by comprising the following steps:
the first step is as follows: glass substrate inspection, second step: coating protective films on the front and back surfaces of the glass substrate, and the third step: cutting and blanking the glass substrate, cutting into small pieces to obtain a glass cover plate,
the fourth step: CNC forming is carried out on the cut glass cover plate in the third step, concave touch points are manufactured by using a grinding head, and the forming of the concave touch points mainly comprises the following steps: CNC engraving and light sweeping, in order to ensure a certain touch sense, combining the thickness of a glass substrate, under the condition of preferentially ensuring the strength of glass, the depth of a concave touch point is controlled to be 1.8mm to 2.0mm of the thickness of a glass cover plate, 0.5mm of the depth of the concave touch point, 1.1mm of the thickness of the glass cover plate, 0.35mm of the depth of the concave touch point, 0.7mm of the thickness of the glass cover plate and 0.25mm of the depth of the concave touch point,
the fifth step: cleaning the glass cover plate, and the sixth step: and (5) inspecting the glass cover plate, and a seventh step: tempering the glass cover plate, putting the glass cover plate with the checked appearance into a tempering furnace for chemical tempering, setting the tempering condition at 420 ℃ for 6 hours, controlling the tempered DOL value to be 8-11 um, the CS value to be 420-450 mPa, the surface hardness to be 7H,
eighth step: cleaning the glass cover plate, and the ninth step: printing black ink once, and the tenth step: baking the glass cover plate at the baking temperature of 180 ℃ for 4 minutes, and performing the tenth step: printing secondary black ink, and a twelfth step: baking the glass cover plate at the baking temperature of 180 ℃ for 4 minutes, and performing a thirteenth step: printing white ink, and a fourteenth step: and baking the glass cover plate at the baking temperature of 160 ℃ for 20-25 minutes.
2. The method for producing the touch display module with the stereoscopic touch control point as claimed in claim 1, wherein: the method also comprises the following steps of: processing sensor circuit glass, printing an etching paste pattern on the back surface of the ITO glass, and sixteenth step: printing a front etching paste pattern, and seventeenth step: printing front protective adhesive ink, and eighteenth step: printing back protective glue ink, and the nineteenth step: printing a front silver paste circuit layer, and twentieth step: printing a back silver paste circuit layer, and twenty-first step: printing a front insulating protective layer, and twenty-second step: printing a back insulating protective layer, and a twenty-third step: cutting the large glass into small pieces, and twenty-fourth step: pre-pasting ACF on the front side and the back side, and twenty-fifth step: binding the FPC, and twenty-sixth step: function detection, twenty-seventh step: cleaning, the twenty-eighth step: cutting the SCA optical cement, and twenty-ninth step: laminating ITO glass and SCA optical cement, thirty steps: pressing the glass cover plate and the ITO glass, and the thirty-first step: defoaming and curing, and a thirty-second step: detection function, thirty-third step: pasting an OCA layer on the back of the TP, and thirty-fourth step: TP and display module assembly laminate completely, the thirty-fifth step: removing bubbles, and thirty-sixth step: and (5) checking the appearance and detecting the function.
3. The method for producing the touch display module with the stereoscopic touch point as claimed in claim 2, wherein: in the fifteenth and sixteenth steps, the mesh number of the screen printing plate is 350 meshes, the thickness of the screen printing plate is 8-10 mu, the hardness of a scraper is 80 degrees, the angle of the scraper is 15-20 degrees, the inclination of the scraper is 0-15 degrees, the pressure of the scraper is 2-3 kg, the speed of the scraper is 5-6 m/min, the off-plate height is 3.5-4 mm, the printing thickness is 12-20 mu, and the baking condition is 135 ℃ for 40 minutes.
4. The method for producing the touch display module with the stereoscopic touch point as claimed in claim 2, wherein: in the seventeenth step, the printing conditions are: the mesh number of the screen printing plate is 200 meshes, the thickness of the screen printing plate is 20-28 mu, the hardness of a scraper is 80 degrees, the angle of the scraper is 20-25 degrees, the inclination of the scraper is 0-15 degrees, the pressure of the scraper is 2-3 kg, the speed of the scraper is 2-8 m/min, the off-plate height is 3-4 mm, the printing thickness is 20-30 mu, and the baking condition of an IR tunnel furnace is set as follows: 240 ℃ and 3.0-5.0 m/min, preheating for 15-20 min after the equipment is started to reach the set temperature, and then performing operation,
in the eighteenth step, the printing conditions are: the mesh number of the screen printing plate is 200 meshes, the thickness of the screen printing plate is 20-28 mu, the hardness of a scraper is 80 degrees, the angle of the scraper is 20-25 degrees, the inclination of the scraper is 0-15 degrees, the pressure of the scraper is 2-3 kg, the speed of the scraper is 2-8 m/min, the off-plate height is 3-4 mm, the printing thickness is 20-30 mu, and the baking conditions are as follows: 160 ℃ for 20 minutes.
5. The method for producing the touch display module with the stereoscopic touch point as claimed in claim 2, wherein: in the nineteenth and twentieth steps, the printing conditions are as follows: the mesh number of the screen printing plate adopts 420 meshes, the thickness of the screen printing plate is 8-10 mu, the hardness of a scraper is 80 degrees, the angle of the scraper is 20-25 degrees, the inclination of the scraper is 0-15 degrees, the pressure of the scraper is 2-3 kg, the speed of the scraper is 3-8 m/min, the off-plate height is 3-3.5 mm, the printing thickness is 8-12 mu, and the baking conditions are as follows: 160 ℃ for 10 minutes.
6. The method for producing the touch display module with the stereoscopic touch point as claimed in claim 2, wherein: in the twenty-ninth step, the setting of the fitting parameters is as follows: rubber roller time delay: 0.5 s; film coating speed: 600-800 mm/s; the running speed is as follows: 600-800 mm/s; initial position of film covering: 25-40 mm; film covering end position: 415-525 mm.
7. The method for producing the touch display module with the stereoscopic touch point as claimed in claim 2, wherein: and in a thirty-third step, adhering the fully-adhered OCA on the back surface of the TP after the function is detected by using a panel turnover machine, controlling the adhering speed to be 20-25 m/min and the pressure to be 0.1-0.2 kg in the adhering process, controlling the cleanliness in the adhering process so as to avoid appearance damage, not removing bubbles if bubbles are small, and removing bubbles once if bubbles are large.
8. The utility model provides a from touch display module of taking three-dimensional touch-control point, it includes glass apron, bonding printing opacity glue film, ITO glass, laminate glue film and display screen entirely, wherein, this bonding printing opacity glue film sets up between this glass apron and this ITO glass, should laminate the glue film setting entirely between this ITO glass and this display screen, this glass apron, this bonding printing opacity glue film, this ITO glass, should laminate glue film entirely and this display screen top-down folds and establishes this touch display module of formation together, its characterized in that: the glass cover plate is provided with a touch top surface and an adhesive bottom surface, the touch top surface and the adhesive bottom surface are parallel to each other, a plurality of three-dimensional touch areas are arranged on the touch top surface, and the three-dimensional touch areas are located right above the ITO glass.
9. The touch display module with the stereoscopic touch point as recited in claim 8, wherein: the three-dimensional touch area is an inward concave touch point.
10. The touch display module with the stereoscopic touch point as recited in claim 9, wherein: the concave touch point is concavely arranged in the glass cover plate and comprises a notch surface and an inner groove surface, wherein the notch surface is connected with the touch top surface, the inner groove surface is connected with the notch surface, and a display coating is arranged on the inner groove surface.
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| CN112620037A (en) * | 2020-12-22 | 2021-04-09 | 连城县中触电子有限公司 | Silver paste-free processing technology and equipment for medium-size and large-size touch screens |
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