CN109471567B - Attaching process of capacitive touch screen - Google Patents
Attaching process of capacitive touch screen Download PDFInfo
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- CN109471567B CN109471567B CN201811130834.9A CN201811130834A CN109471567B CN 109471567 B CN109471567 B CN 109471567B CN 201811130834 A CN201811130834 A CN 201811130834A CN 109471567 B CN109471567 B CN 109471567B
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- touch screen
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- 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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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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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- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses a bonding process of a capacitive touch screen, which mainly comprises the following steps: laminating OCA solid glue on the TFT screen → laminating the TP screen on the TFT screen → pre-laminating → vacuum defoaming → passing through a transition film → passing through UV → packaging and warehousing, wherein after the vacuum defoaming is finished, the pressure of the inside of the vacuum defoaming machine is released at the speed of 10Pa/S until the pressure release is finished; the pressure inside the vacuum defoaming machine is released in a slow pressure release mode, so that the stress difference phenomenon caused by the stiffness stress of the TP plate and the slow recovery of the thermal stress of the OCA optical cement is reduced, the generation of re-released bubbles is avoided, and the defoaming effect of the touch screen is improved; and the touch screen is baked in a secondary UV baking mode in the process of passing through the UV machine, so that bubbles can be further prevented from being generated again.
Description
Technical Field
The invention relates to the technical field of touch screen preparation, in particular to a bonding process of a capacitive touch screen.
Background
Touch screen (also called touch screen or touch panel) is an inductive liquid crystal display device capable of receiving input signals such as touch, when touching graphic buttons on the screen, the touch feedback system on the screen can drive various connecting devices according to a pre-programmed program, and can replace a mechanical button panel and produce vivid video and audio effects by the liquid crystal display picture. As a latest computer input device, the touch screen is the simplest, convenient and natural man-machine interaction mode at present. The multimedia interactive device gives the multimedia a brand-new appearance and is a brand-new multimedia interactive device with great attractiveness.
The production scale of touch-sensitive screen also enlarges day by day, the most leading sense touch device of touch-sensitive screen is the response base plate of installing in transparent face lid below, transparent face lid sets up the outer end at the response base plate in the product, play the effect of protection response base plate, response base plate below sets up the display screen, connect together through OCA optical cement between transparent face lid and response base plate and the display screen, OCA optical cement has high transparency, the luminousness reaches more than 99%, in the strong light irradiation, use also the harmless outward appearance under the environment of high temperature and high humidity. In the prior art, some empty mass remains after the touch screen is attached, so bubbles are generated, and therefore, defoaming treatment needs to be performed after the touch screen is attached. Conventionally, in order to reduce bubbles generated during bonding, a method of placing a touch panel which is previously bonded in a vacuum defoaming machine and defoaming the touch panel has been generally adopted. However, in the actual manufacturing process, due to the characteristics that the stiffness stress of the TP plate on the touch screen is not affected by the temperature and the stress of the OCA optical cement is slowly recovered after being heated, a stress difference is formed between the TP plate and the OCA optical cement after the vacuum defoaming is completed, so that the bubbles removed after the vacuum defoaming are likely to rebound to form re-foaming bubbles, and the defoaming effect of the touch screen is greatly affected.
Disclosure of Invention
In order to solve the problems, the invention provides the attaching process of the capacitive touch screen, which has a good defoaming effect and can effectively avoid the generation of re-emitted bubbles.
The invention adopts the following technical scheme:
a bonding process of a capacitive touch screen mainly comprises the following steps:
step 1: flattening the OCA solid glue, tearing off a release film on one side face of the OCA solid glue, tearing off a protective film on the TFT screen, aligning and adhering the TFT screen and the OCA solid glue, and manually pressing;
step 2: taking a TP screen, tearing off a transition film on the outer surface of the TP screen, tearing off a release film on the other side surface of the OCA solid glue in the step 1, aligning and laminating the TP screen and one side surface of the TFT screen, which is laminated with the OCA solid glue, and manually pressing to obtain a semi-finished touch screen;
and step 3: putting the semi-finished touch screen obtained in the step 2 into an OCF machine for pre-lamination to obtain a pre-laminated touch screen;
and 4, step 4: putting the pre-fitted touch screen obtained in the step 3 into a vacuum defoaming machine for vacuum defoaming, after the vacuum defoaming is completed, decompressing the inside of the vacuum defoaming machine at the speed of 10Pa/S until the decompression is completed to obtain a defoaming touch screen, and taking out the defoaming touch screen;
and 5: placing the defoaming touch screen obtained in the step 4 into a film covering machine to carry out transitional film covering treatment on the outer surface of the defoaming touch screen to obtain a film covered touch screen;
step 6: placing the film-coated touch screen obtained in the step 5 into a UV machine to be baked according to the mode that the TFT screen faces upwards, taking out the film-coated touch screen after being baked for 10-20 min, then placing the film-coated touch screen into the UV machine to be baked for the second time according to the mode that the TP screen faces upwards, and taking out the film-coated touch screen after being baked for 10-20 min to obtain a finished touch screen;
and 7: and (6) packaging and warehousing the finished touch screen obtained in the step (6).
As a preferable technical scheme of the invention, the temperature for pre-bonding in the step 3 is 65-75 ℃, the pre-bonding time is 60-100S, and the pre-bonding pressure is 0.1-0.2 MPa.
As a preferable technical scheme of the invention, the temperature for vacuum defoaming in the step 4 is 65-70 ℃, the time for vacuum defoaming is 20-25 min, and the pressure for vacuum defoaming is 0.15-0.2 MPa.
The invention has the beneficial effects that:
according to the invention, after the vacuum defoaming is finished, the pressure inside the vacuum defoaming machine is released in a slow pressure release manner, so that the stress difference phenomenon caused by slow recovery of TP plate stiffness stress and OCA optical cement thermal stress is reduced, the generation of recurrent bubbles is avoided, and the defoaming effect of the touch screen is improved; according to the invention, the touch screen is subjected to UV baking twice after being coated with the film, so that bubbles can be further prevented from being generated again.
Detailed Description
The present invention will now be described in further detail with reference to examples.
Example 1
A bonding process of a capacitive touch screen mainly comprises the following steps:
step 1: flattening the OCA solid glue, tearing off a release film on one side face of the OCA solid glue, tearing off a protective film on the TFT screen, aligning and adhering the TFT screen and the OCA solid glue, and manually pressing;
step 2: taking a TP screen, tearing off a transition film on the outer surface of the TP screen, tearing off a release film on the other side surface of the OCA solid glue in the step 1, aligning and laminating the TP screen and one side surface of the TFT screen, which is laminated with the OCA solid glue, and manually pressing to obtain a semi-finished touch screen;
and step 3: putting the semi-finished touch screen obtained in the step 2 into an OCF machine for pre-lamination to obtain a pre-laminated touch screen;
and 4, step 4: putting the pre-fitted touch screen obtained in the step 3 into a vacuum defoaming machine for vacuum defoaming, after the vacuum defoaming is completed, decompressing the inside of the vacuum defoaming machine at the speed of 10Pa/S until the decompression is completed to obtain a defoaming touch screen, and taking out the defoaming touch screen;
and 5: placing the defoaming touch screen obtained in the step 4 into a film covering machine to carry out transitional film covering treatment on the outer surface of the defoaming touch screen to obtain a film covered touch screen;
step 6: placing the film-coated touch screen obtained in the step 5 into a UV machine for baking according to the mode that the TFT screen faces upwards, taking out the film-coated touch screen after baking for 20min, then placing the film-coated touch screen into the UV machine for secondary baking according to the mode that the TP screen faces upwards, and taking out the film-coated touch screen after secondary baking for 20min to obtain a finished touch screen;
and 7: packaging and warehousing the finished touch screen obtained in the step 6;
wherein, the temperature for pre-bonding in the step 3 is 65 ℃, the time for pre-bonding is 100S, and the pressure for pre-bonding is 0.1 Mpa; wherein the temperature for vacuum defoaming in the step 4 is 65 ℃, the time for vacuum defoaming is 25min, and the pressure for vacuum defoaming is 0.2 MPa.
Example 2
A bonding process of a capacitive touch screen mainly comprises the following steps:
step 1: flattening the OCA solid glue, tearing off a release film on one side face of the OCA solid glue, tearing off a protective film on the TFT screen, aligning and adhering the TFT screen and the OCA solid glue, and manually pressing;
step 2: taking a TP screen, tearing off a transition film on the outer surface of the TP screen, tearing off a release film on the other side surface of the OCA solid glue in the step 1, aligning and laminating the TP screen and one side surface of the TFT screen, which is laminated with the OCA solid glue, and manually pressing to obtain a semi-finished touch screen;
and step 3: putting the semi-finished touch screen obtained in the step 2 into an OCF machine for pre-lamination to obtain a pre-laminated touch screen;
and 4, step 4: putting the pre-fitted touch screen obtained in the step 3 into a vacuum defoaming machine for vacuum defoaming, after the vacuum defoaming is completed, decompressing the inside of the vacuum defoaming machine at the speed of 10Pa/S until the decompression is completed to obtain a defoaming touch screen, and taking out the defoaming touch screen;
and 5: placing the defoaming touch screen obtained in the step 4 into a film covering machine to carry out transitional film covering treatment on the outer surface of the defoaming touch screen to obtain a film covered touch screen;
step 6: placing the film-coated touch screen obtained in the step 5 into a UV machine for baking according to the mode that the TFT screen faces upwards, taking out the film-coated touch screen after baking for 10min, then placing the film-coated touch screen into the UV machine for secondary baking according to the mode that the TP screen faces upwards, and taking out the film-coated touch screen after secondary baking for 10min to obtain a finished touch screen;
and 7: packaging and warehousing the finished touch screen obtained in the step 6;
wherein, the temperature for pre-laminating in the step 3 is 75 ℃, the pre-laminating time is 60S, and the pre-laminating pressure is 0.2 Mpa; wherein the temperature for vacuum defoaming in the step 4 is 70 ℃, the time for vacuum defoaming is 20min, and the pressure for vacuum defoaming is 0.15 MPa.
Example 3
A bonding process of a capacitive touch screen mainly comprises the following steps:
step 1: flattening the OCA solid glue, tearing off a release film on one side face of the OCA solid glue, tearing off a protective film on the TFT screen, aligning and adhering the TFT screen and the OCA solid glue, and manually pressing;
step 2: taking a TP screen, tearing off a transition film on the outer surface of the TP screen, tearing off a release film on the other side surface of the OCA solid glue in the step 1, aligning and laminating the TP screen and one side surface of the TFT screen, which is laminated with the OCA solid glue, and manually pressing to obtain a semi-finished touch screen;
and step 3: putting the semi-finished touch screen obtained in the step 2 into an OCF machine for pre-lamination to obtain a pre-laminated touch screen;
and 4, step 4: putting the pre-fitted touch screen obtained in the step 3 into a vacuum defoaming machine for vacuum defoaming, after the vacuum defoaming is completed, decompressing the inside of the vacuum defoaming machine at the speed of 10Pa/S until the decompression is completed to obtain a defoaming touch screen, and taking out the defoaming touch screen;
and 5: placing the defoaming touch screen obtained in the step 4 into a film covering machine to carry out transitional film covering treatment on the outer surface of the defoaming touch screen to obtain a film covered touch screen;
step 6: placing the film-coated touch screen obtained in the step 5 into a UV machine for baking according to the mode that the TFT screen faces upwards, taking out the film-coated touch screen after baking for 15min, then placing the film-coated touch screen into the UV machine for secondary baking according to the mode that the TP screen faces upwards, and taking out the film-coated touch screen after secondary baking for 15min to obtain a finished touch screen;
and 7: and (6) packaging and warehousing the finished touch screen obtained in the step (6).
Wherein, the temperature for pre-bonding in the step 3 is 70 ℃, the time for pre-bonding is 80S, and the pressure for pre-bonding is 0.2 Mpa; wherein the temperature for vacuum defoaming in the step 4 is 65 ℃, the time for vacuum defoaming is 23min, and the pressure for vacuum defoaming is 0.2 MPa.
Finally, it should be noted that: these embodiments are merely illustrative of the present invention and do not limit the scope of the present invention. In addition, other variations and modifications will be apparent to persons skilled in the art based on the foregoing description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (2)
1. The laminating process of the capacitive touch screen is characterized by comprising the following steps: the method mainly comprises the following steps:
step 1: flattening the OCA solid glue, tearing off a release film on one side face of the OCA solid glue, tearing off a protective film on the TFT screen, aligning and adhering the TFT screen and the OCA solid glue, and manually pressing;
step 2: taking a TP screen, tearing off a transition film on the outer surface of the TP screen, tearing off a release film on the other side surface of the OCA solid glue in the step 1, aligning and laminating the TP screen and one side surface of the TFT screen, which is laminated with the OCA solid glue, and manually pressing to obtain a semi-finished touch screen;
and step 3: putting the semi-finished touch screen obtained in the step 2 into an OCF machine for pre-lamination to obtain a pre-laminated touch screen;
and 4, step 4: putting the pre-fitted touch screen obtained in the step 3 into a vacuum defoaming machine for vacuum defoaming, after the vacuum defoaming is completed, decompressing the inside of the vacuum defoaming machine at the speed of 10Pa/S until the decompression is completed to obtain a defoaming touch screen, and taking out the defoaming touch screen;
and 5: placing the defoaming touch screen obtained in the step 4 into a film covering machine to carry out transitional film covering treatment on the outer surface of the defoaming touch screen to obtain a film covered touch screen;
step 6: placing the film-coated touch screen obtained in the step 5 into a UV machine to be baked according to the mode that the TFT screen faces upwards, taking out the film-coated touch screen after being baked for 10-20 min, then placing the film-coated touch screen into the UV machine to be baked for the second time according to the mode that the TP screen faces upwards, and taking out the film-coated touch screen after being baked for 10-20 min to obtain a finished touch screen;
and 7: packaging and warehousing the finished touch screen obtained in the step 6;
the pre-bonding temperature in the step 3 is 65-75 ℃, the pre-bonding time is 60-100S, and the pre-bonding pressure is 0.1-0.2 MPa.
2. The attaching process of the capacitive touch screen according to claim 1, wherein: the temperature for vacuum defoaming in the step 4 is 65-70 ℃, the time for vacuum defoaming is 20-25 min, and the pressure for vacuum defoaming is 0.15-0.2 MPa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811130834.9A CN109471567B (en) | 2018-09-27 | 2018-09-27 | Attaching process of capacitive touch screen |
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| CN201811130834.9A CN109471567B (en) | 2018-09-27 | 2018-09-27 | Attaching process of capacitive touch screen |
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| CN109471567B true CN109471567B (en) | 2022-02-11 |
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| CN110824737B (en) * | 2019-09-24 | 2022-05-03 | 四川省长江华云电子技术有限公司 | Hard-to-hard vacuum full-lamination process |
| CN111806052B (en) * | 2020-06-12 | 2022-06-14 | 深圳全息界科技有限公司 | Display screen laminating process and display screen |
| CN112797061A (en) * | 2020-12-30 | 2021-05-14 | 盐城创盈利科技有限公司 | Full-lamination process for touch screen production |
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| CN102963106A (en) * | 2012-12-07 | 2013-03-13 | 深圳市志凌伟业技术有限公司 | High-pressure bubble removing method for capacitive touch screen |
| CN103009775A (en) * | 2012-12-24 | 2013-04-03 | 江西联创电子有限公司 | Operation method for sticking device |
| CN108509085A (en) * | 2018-06-08 | 2018-09-07 | 芜湖长信科技股份有限公司 | A kind of vehicular touch screen and preparation method thereof that can reduce glue fitting bubble |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5905983B1 (en) * | 2015-02-19 | 2016-04-20 | 積水化学工業株式会社 | Light transmissive conductive film, film roll thereof, and touch panel having the same |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102402902A (en) * | 2010-09-07 | 2012-04-04 | 株式会社日立工业设备技术 | Assembling System For 3d Display Panel Device Having Touch Panel |
| CN102963106A (en) * | 2012-12-07 | 2013-03-13 | 深圳市志凌伟业技术有限公司 | High-pressure bubble removing method for capacitive touch screen |
| CN103009775A (en) * | 2012-12-24 | 2013-04-03 | 江西联创电子有限公司 | Operation method for sticking device |
| CN108509085A (en) * | 2018-06-08 | 2018-09-07 | 芜湖长信科技股份有限公司 | A kind of vehicular touch screen and preparation method thereof that can reduce glue fitting bubble |
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Denomination of invention: A Bonding Process for Capacitive Touch Screen Effective date of registration: 20230703 Granted publication date: 20220211 Pledgee: Guangxi Laibin Rural Commercial Bank Co.,Ltd. Pledgor: GUANGXI ZHONGPEI OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Registration number: Y2023450000095 |