CN101504496A - Touch screen and panel display module integrated combination module and method for producing the same - Google Patents
Touch screen and panel display module integrated combination module and method for producing the same Download PDFInfo
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- CN101504496A CN101504496A CNA2009100375872A CN200910037587A CN101504496A CN 101504496 A CN101504496 A CN 101504496A CN A2009100375872 A CNA2009100375872 A CN A2009100375872A CN 200910037587 A CN200910037587 A CN 200910037587A CN 101504496 A CN101504496 A CN 101504496A
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Abstract
The invention discloses an integrative composite module of a touch screen and a flat panel display module and a method for manufacturing the same. The composite module comprises the touch screen, the flat panel display module, and a middle adhesive layer for adhering the touch screen and the flat panel display module, wherein the adhesive layer is an optical adhesive layer which fully covers the visual area of the touch screen, and the refractive index of the optical adhesive layer is same as or similar to that of the interface of the touch screen and the flat panel display module. The composite module is provided with the optical adhesive layer between the touch screen and the flat panel display module, and the refractive index of the optical adhesive layer is same as or similar to that of the interface of the touch screen and the flat panel display module, thus the reflectivity of the composite module can be reduced effectively, the light loss of the composite module can also be reduced simultaneously, and the light transmittance of the combined module is improved. The composite module adopts a simple manufacturing method and is easy to operate.
Description
Technical field
The present invention relates to a kind of touch-screen peace panel display module integrated combination module and preparation method thereof, by the method that adopts optical cement touch-screen and flat display module to be assembled together as bonding medium.
Background technology
Since doctor Hurst in 1974 has designed the first item transparent touch screen, touch-screen with provide bluntly, man-machine dialog interface and obtained fast development efficiently.The product that product, especially touch-screen that touch-screen and display module combine and the LCD MODULE of being seen everywhere in the market combines, for example: mobile phone, player, digital camera or the like, wherein again with the application of mobile phone typical case and general the most.At first, the touch-screen of mobile phone assembling producer and LCD MODULE are respectively from different suppliers, because design concept and process control is different, cause touch-screen and LCD MODULE after the place's assembling of mobile phone assembling producer, to occur on the function again and again or fit on bad, therefore mobile phone assembling producer more and more tends to adopt touch-screen and LCD MODULE to come from same supplier's way, especially wish to go out again to mobile phone assembling producer after this supplier can assemble touch-screen and LCD MODULE, convenient in the time of will making mobile phone assembling producer's use touch-screen and LCD MODULE integration product like this, the back solution route that goes wrong is more quick.Therefore touch-screen and flat display module assemble integrated a kind of trend that becoming.
Its structure of traditional touch-screen and flat display module assembling integrated module as shown in Figures 1 to 4, it comprises that it comprises touch-screen 11, flat display module 14, double faced adhesive tape bonding coat 12 between touch-screen 11 and the flat display module 14, double faced adhesive tape 12 can only stick to the periphery of flat display module 14, the zone line of flat display module 14 does not have bonding coat, cause forming between touch-screen 11 and the flat display module 14 large-scale clearance 13, flat display module 14 also has the housing 14a and the interface line 14b of display module, when assembling, earlier double faced adhesive tape 12 is attached to the bottom surface of touch-screen 11, and then is assembled together with flat display module 14.
There are the following problems for above-mentioned module:
(1) first, thickness is thick partially.The thickness of the general double faced adhesive tape 12 that uses is 0.3 millimeter, for preventing between touch-screen 11 and the flat display module 14 because the problem that distance is too closely brought, generally the housing 14a design meeting of display module can be exceeded 0.2 millimeter than flat display module 14 surfaces, just have 0.5 millimeter clearance 13 between touch-screen 11 and flat display module 14 surfaces like this.
(2) second, anti-dust performance is poor.By as can be seen shown in Figure 2, the existence of the interface line 14b of flat display module 14 makes extraneous dust enter in the clearance 13 between touch-screen 11 and the flat display module 14 by this place easily.
(3) the 3rd, contrast descends, and display effect is poor.The display effect difference is two aspects, first reflectivity is higher, as shown in Figure 3, when sunshine during from extraneous irradiating liquid crystal display module, touch-screen 11 surfaces, the interface of touch-screen 11 and clearance 13, the interface of clearance 13 and flat display module 14 is because different about 4% the reflected light that all exist of medium refraction index cause the overall reflectivity of integrated module higher.It two is that transmittance reduces, as shown in Figure 4, when the display screen operate as normal, also all there is reflection of light during through the interface between flat display module 14, clearance 13 and the touch-screen 11 in light that backlight 15 sends, cause light loss, make the transmittance of integrated module descend.Reflectivity direct influence higher and that transmittance reduces will be the decline of integrated module overall contrast, the display effect variation.
Summary of the invention
One of purpose of the present invention provides the touch-screen peace panel display module integrated combination module that a kind of reflectivity is low, transmittance is high, and this composite module can greatly reduce optical loss, makes contrast improve, and display effect is better.
This purpose of the present invention realizes by following technical solution: a kind of touch-screen peace panel display module integrated combination module, it comprises the intermediate adhesion layer of touch-screen, flat display module, bonding described touch-screen and flat display module, it is characterized in that: described bonding coat is the optics glue-line, described optics glue-line covers the vision area of described touch-screen fully, and the refractive index of described optics glue-line is identical or close with the refractive index at described touch-screen and flat display module interface.
The present invention is provided with the optical cement bonding coat between touch-screen and flat display module, and the refractive index of optics glue-line is identical or close with the refractive index at touch-screen and flat display module interface, there is not the interface, clearance between touch-screen and the flat display module, therefore, when sunshine shines on the flat display module from the external world, only there is primary event light in whole module integrated combination between touch-screen and air interface, make the overall reflectivity of composite module reduce; Equally, when the flat display module operate as normal, also only there is once the light reflection in the light that backlight sends between touch-screen and air interface, and light loss is low, makes the transmittance of module integrated combination improve.
Among the present invention, the thickness of described optics glue-line is 20 microns～500 microns, and the overlay area is less than or equal to the physical dimension of described touch-screen.
Among the present invention, described touch-screen is resistive touch screen or capacitive touch screen, or other touch-screen.
Among the present invention, described flat display module is LCD MODULE or OLED display module or other display module.
Two of purpose of the present invention provides the method for making of above-mentioned kind of touch-screen peace panel display module integrated combination module.
This purpose of the present invention realizes by following technical solution: a kind of method for making of touch-screen peace panel display module integrated combination module, it comprises the steps:
(1) makes touch-screen and flat display module;
(2) apply optical cement on described touch-screen, the coated area of optical cement covers the vision area of described touch-screen fully, and is less than or equal to the physical dimension of described touch-screen;
(3) touch-screen and the flat display module that will apply optical cement fits together, and described optical cement forms one deck optics glue-line between touch-screen and flat display module;
(4) described optics glue-line is carried out dried glue and handle, the refractive index of the optics glue-line behind the dried glue is identical or close with the refractive index at described touch-screen and flat display module interface.
The present invention can do following improvement: coated optical cement is liquid glue in the described step (2), and the dried glue treatment process described in the described step (4) is done the adhesive curing operation and can be adopted following three kinds of modes for doing the adhesive curing operation:
Described dried adhesive curing operation is ultraviolet curing, and it solidifies the long-pending weight range of light is 1000mJ/cm
2～5000mJ/cm
2Described dried adhesive curing operation is a curing oven, and the curing oven temperature range is 60 ℃～90 ℃, and be 5～120 minutes set time.
Described dried adhesive curing operation is a two-stage cure, the ultraviolet curing of first step elder generation, and the long-pending weight range of its ultraviolet curing light is 1000mJ/cm
2～5000mJ/cm
2, be 5～250 seconds set time; Second step was carried out curing oven again, and the curing oven temperature range is 60 ℃～90 ℃, and be 5～120 minutes set time.
The present invention can also do following improvement: coated optical cement is solid-state glue in the described step (2), dried glue treatment process described in the described step (4) is a glue-line de-bubble operation, described optics glue-line is carried out de-bubble to be handled, the temperature range that de-bubble is handled is 30 ℃～80 ℃, pressure limit is 0.2MPa～1.0MPa, and the de-bubble time is 5～60 minutes.。
Compared with prior art, the present invention has following remarkable result:
1, the present invention is provided with the optical cement bonding coat between touch-screen and flat display module, and the refractive index of optics glue-line is identical or close with the refractive index at touch-screen and flat display module interface, can effectively reduce the reflectivity of composite module, can reduce simultaneously the light loss of composite module again, improve its transmittance.
2, the thickness of optics glue-line is low, makes the integral thickness attenuation of module integrated combination, saves its usage space.
3, there are not clearance, the possibility that does not exist dust to enter between touch-screen among the present invention and the flat display module.
Description of drawings
Fig. 1 is the one-piece construction synoptic diagram of the integrated module of traditional approach;
Fig. 2 is the decomposition texture synoptic diagram of the integrated module of traditional approach;
Fig. 3 is the one-piece construction synoptic diagram of the integrated module of traditional approach, shows the reflected light diagram;
Fig. 4 is the one-piece construction synoptic diagram of the integrated module of traditional approach, shows the light loss diagram of transmitted light;
Fig. 5 is the one-piece construction synoptic diagram of module integrated combination of the present invention, shows the reflected light diagram;
Fig. 6 is the one-piece construction synoptic diagram of module integrated combination of the present invention, shows the light loss diagram of transmitted light;
Fig. 7 is the decomposition texture synoptic diagram of module integrated combination of the present invention;
Fig. 8 is the middle touch-screen and the bonding structural representation of flat display module of module integrated combination of the present invention, and the optical cement that adopt this moment is liquid optical cement;
Fig. 9 is the middle touch-screen and the bonding structural representation of flat display module of module integrated combination of the present invention, and the optical cement that adopt this moment is a solid state optics glue.
Embodiment
The touch-screen peace panel display module integrated combination module extremely shown in Figure 7 as Fig. 5, it comprises the intermediate adhesion layer of touch-screen 21, flat display module 23 and bonding touch-screen and flat display module, this touch-screen 21 adopts resistive touch screen, this flat display module 23 is a LCD MODULE, intermediate adhesion layer is an optics glue-line 22, its thickness is 100 microns, optics glue-line 22 covers the vision area of touch-screen 21 fully, and equal the physical dimension of touch-screen 21, the refractive index of optics glue-line 22 is identical with the refractive index at touch-screen 21 and flat display module 23 interfaces.
As shown in Figure 5, when light when the external world injects integrated module, because touch-screen 21, optics glue-line 22 and flat display module 23 have identical refractive index, then just there is not reflection of light between three kinds of materials, only there is about 4% reflected light in touch screen surface, reduced by twice light reflection, reduced surface reflectivity.
As shown in Figure 6, when the flat display module operate as normal, the light of backlight 24 is by flat display module 23, optics glue-line 22 and touch-screen 21 and when entering human eye, only there is light loss at the interface of touch-screen 21 and air, thereby the transmittance that improves, net result is that contrast is improved, and display effect is better.
Present embodiment can also be done as down conversion: the size of optics glue-line also can be less than the physical dimension of touch-screen, the refractive index at the refractive index of optics glue-line and touch-screen and flat display module interface close also can, but can not differ too big.
The thickness of optics glue-line can be chosen between 20 microns～500 microns all can, the optics glue-line is thin more, the integral thickness of composite module is also just thin more.
Touch-screen also can adopt the touch-screen of capacitive touch screen or other type, and same flat display module also can adopt OLED display module or other display module.
When the present invention uses, when light when the external world injects integrated module, because touch-screen 21, optics glue-line 22 and flat display module 23 have identical refractive index, then just there is not reflection of light between three kinds of materials, only there is about 4% reflected light in touch-screen 21 surfaces, reduced by twice light reflection, reduced surface reflectivity.
The method of making the combinations thereof module can adopt following two kinds:.
The first adopts liquid optical cement (can adopt the optical cement of the U-1070B model of the SVR1300 of Sony Corporation or CHEMITECH company) to carry out module integrated combination as bonding agent and makes as shown in Figure 8, and it comprises the steps:
(1) make touch-screen 21 and flat display module 23, wherein, what touch-screen 21 adopted is the film-glass structure, and the refractive index of glass is 1.52; What flat display module 23 adopted is the LCD MODULE of thin film transistor (TFT) (TFT) mode, and the refractive index of its glass is 1.52;
(2) apply the liquid optical cement of one deck on touch-screen 21, the coated area of optical cement covers the vision area of touch-screen 21 fully, and equals the physical dimension of touch-screen 21;
(3) touch-screen 21 and the flat display module 23 that will apply optical cement fits together, optical cement forms one deck optics glue-line between touch-screen and flat display module, during applying, base plate with touch-screen 21, be that glass is placed up, optical cement is dropped on the glass of touch-screen 21, then with 21 upsets of touch-screen, make glass down, place flat display module 23 and face up this moment, and touch-screen 21 and flat display module 23 carry out contraposition then, and touch-screen 21 slowly descends, near flat display module 23, up to the surface of the liquid level of optical cement contact flat display module 23, slowly progressively close again, when touch-screen 21 slowly drop to apart from 0.01 centimetre on flat display module 23 surfaces apart from the time, stop motion allows glue diffuse to whole surface voluntarily;
(4) the optics glue-line is carried out dried glue and handle, this dried glue treatment process is for doing the adhesive curing operation, and doing the adhesive curing operation is two-stage cure, the ultraviolet curing of first step elder generation, and the long-pending weight range of its ultraviolet curing light is 2000mJ/cm2, be 125 seconds set time; Second step was carried out curing oven again, and the curing oven temperature range is 80 ℃, and be 60 minutes set time, and the refractive index of the optics glue-line 22 behind the dried glue is 1.52.
Dried adhesive curing operation in the above-mentioned steps (4) can also adopt following multiple mode to carry out:
One: do the adhesive curing operation and adopt independent ultraviolet curing operation, it solidifies the long-pending weight range of light is 1000mJ/cm
2～5000mJ/cm
2, be 5～250 seconds set time, the long-pending amount=light intensity of light was taken advantage of in the time, because different ultraviolet light equipment light intensity is different, so its set time is also different, can set according to actual needs set time, as long as satisfy dried glue full solidification.
Its two: do the adhesive curing operation and adopt independent curing oven operation, the curing oven temperature range is 60 ℃～90 ℃, and be 5～120 minutes set time.
Its three: do the two-stage cure operation that the adhesive curing operation adopts ultraviolet ray and baking oven combination, the ultraviolet curing of first step elder generation, it is 1000mJ/cm that its ultraviolet curing light amasss weight range
2～5000mJ/cm
2, be 5～250 seconds set time; Second step was carried out curing oven again, and the curing oven temperature range is 60 ℃～90 ℃, and be 5～120 minutes set time.
The method of making the combinations thereof module can also adopt method shown in Figure 9, adopt solid state optics glue (can adopt the optical cement of MHM80 model of 8275 or day Rong Huagong of 3M company) to carry out module integrated combination as bonding agent and make, it comprises the steps:
(1) make touch-screen 21 and flat display module 23, wherein, what touch-screen 21 adopted is the film-glass structure, and the refractive index of glass is 1.52; What flat display module 23 adopted is the LCD MODULE of thin film transistor (TFT) (TFT) mode, and the refractive index of its glass is 1.52; The refractive index of solid state optics glue is 1.48, and thickness is 0.1mm;
(2) apply one deck solid state optics glue on touch-screen, the coated area of optical cement covers the vision area of touch-screen fully, and is slightly less than the physical dimension of touch-screen;
(3) touch-screen and the flat display module that will apply optical cement fits together, optical cement forms one deck optics glue-line between touch-screen 21 and flat display module 23, during applying, touch-screen 21 and flat display module 23 contrapositions is accurate, then with running roller 25 from touch-screen 21 is pressed on the flat display module 23;
(4) the optics glue-line being carried out dried glue handles, dried glue treatment process is the de-bubble operation, the touch-screen 21 that posts and flat display module 23 be placed on carry out de-bubble in the de-bubble equipment, set 50 ℃ of de-bubble temperature, pressure 0.5MPa, 0.5 hour time, the refractive index of the optics glue-line 22 behind the dried glue is 1.48.
In the de-bubble operation in the above-mentioned steps (4), the temperature range that general de-bubble is handled is 30 ℃～80 ℃, and pressure limit is 0.2MPa～1.0MPa, and the de-bubble time is 5～60 minutes.
Following table is the composite module of above-mentioned two kinds of methods preparation and the contrast table of conventional combination module:
| Thickness | Reflectivity | Surface brightness | Contrast | |
| Traditional approach | 3.8 |
12％ | 189.5cd/m 2 | 131.5 |
| Liquid optical cement mode | 3.4mm | 4％ | 210cd/m 2 | 161.1 |
| Solid state optics glue mode | 3.4mm | 5.3％ | 202cd/m 2 | 151.3 |
As can be seen from the above embodiments, adopt the refractive index optical cement identical or close not only can make the thickness attenuation of integrated module as the bonding agent of integrated module with touch-screen and flat display module, also reduced its reflectivity, improved transmittance, contrast, display effect is better.
Claims (10)
1, a kind of touch-screen peace panel display module integrated combination module, it comprises the intermediate adhesion layer of touch-screen, flat display module, bonding described touch-screen and flat display module, it is characterized in that: described bonding coat is the optics glue-line, described optics glue-line covers the vision area of described touch-screen fully, and the refractive index of described optics glue-line is identical or close with the refractive index at described touch-screen and flat display module interface.
2, touch-screen peace panel display module integrated combination module according to claim 1, it is characterized in that: the thickness of described optics glue-line is 20 microns～500 microns, and the overlay area is less than or equal to the physical dimension of described touch-screen.
3, touch-screen peace panel display module integrated combination module according to claim 1, it is characterized in that: described touch-screen is resistive touch screen or capacitive touch screen.
4, touch-screen peace panel display module integrated combination module according to claim 1, it is characterized in that: described flat display module is LCD MODULE or OLED display module.
5, a kind of method for making of touch-screen peace panel display module integrated combination module as claimed in claim 1, it comprises the steps:
(1) makes touch-screen and flat display module;
(2) apply optical cement on described touch-screen, the coated area of optical cement covers the vision area of described touch-screen fully, and is less than or equal to the physical dimension of described touch-screen;
(3) touch-screen and the flat display module that will apply optical cement fits together, and described optical cement forms one deck optics glue-line between touch-screen and flat display module;
(4) described optics glue-line is carried out dried glue and handle, the refractive index of the optics glue-line behind the dried glue is identical or close with the refractive index at described touch-screen and flat display module interface.
6, method for making according to claim 5 is characterized in that: coated optical cement is liquid glue in the described step (2), and the dried glue treatment process described in the described step (4) is for doing the adhesive curing operation.
7, method for making according to claim 6 is characterized in that: described dried adhesive curing operation is ultraviolet curing, and it solidifies the long-pending weight range of light is 1000mJ/cm
2～5000mJ/cm
2
8, method for making according to claim 6 is characterized in that: described dried adhesive curing operation is a curing oven, and the curing oven temperature range is 60 ℃～90 ℃, and be 5～120 minutes set time.
9, method for making according to claim 6 is characterized in that: described dried adhesive curing operation is a two-stage cure, the ultraviolet curing of first step elder generation, and the long-pending weight range of its ultraviolet curing light is 1000mJ/cm
2～5000mJ/cm
2Second step was carried out curing oven again, and the curing oven temperature range is 60 ℃～90 ℃, and be 5～120 minutes set time.
10, method for making according to claim 5, it is characterized in that: coated optical cement is solid-state glue in the described step (2), dried glue treatment process described in the described step (4) is a glue-line de-bubble operation, described optics glue-line is carried out de-bubble to be handled, the temperature range that de-bubble is handled is 30 ℃～80 ℃, pressure limit is 0.2MPa～1.0MPa, and the de-bubble time is 5～60 minutes.
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| CN101840289A (en) * | 2010-04-16 | 2010-09-22 | 友达光电股份有限公司 | Touch control module and sensing device |
| CN102270059A (en) * | 2011-06-21 | 2011-12-07 | 信利半导体有限公司 | Method for bonding touch screen to display screen |
| WO2012061975A1 (en) * | 2010-11-09 | 2012-05-18 | Tpk Touch Solutions Inc. | Touch panel device |
| CN102629172A (en) * | 2012-02-28 | 2012-08-08 | 无锡丽格光电科技有限公司 | Attaching process of capacitive touch screen and liquid crystal display module (LCM) |
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