The method for making of camber-shaped capacitance type touch-control plate
Technical field
The present invention relates to a kind of method for making of camber-shaped capacitance type touch-control plate, particularly a kind of capacitive touch control plate is moulded made the curved method of formation, and the touch pad structure of utilizing described method to process.
Background technology
Existing comparatively common plane Trackpad (Touch Panel) includes resistance-type and capacitive touch control plate; Wherein, Have a touch-control circuit in the capacitive touch control plate, gold-tinted processing procedures such as exposure capable of using, development, etching are with transparent conductive material (tin indium oxide _ Indium Tin Oxide; ITO) be stacked on the surface of a transparency carrier one by one, and become a transparent capacitive touch control plate; Perhaps, described touch-control circuit also can be a flexible circuit board (FLEXBILPRINTED CIRCIT, FPC), described flexible circuit board is directly to fit with described substrate, and becomes a nontransparent capacitive touch control plate; So, the capacity effect that is produced between described touch-control circuit capable of using and the human body is to calculate the coordinate of its position of touch.
And know that it is main flow with the curved design that present photovoltaic will be entered rank; Therefore, when product design, some physical buttons and art designing's seam thereof are set up in its surface, can cause the curvature of product surface inharmonious, and increase the curved design on described surface and the degree of difficulty of manufacturing; In addition; The correlation technique that relates to above-mentioned curved surface shape product at present, the visible convex surface LCD of publishing and showing in June, 2008 in No. the 1110377th, BrP, No. the 2002341323rd, Jap.P., Chinese patent No. 1612185 (publication number) and Youda Photoelectric Co., Ltd (AUO PTRONIC SCORP.); Yet described technology is to use about the curved surface of safety glass or LCD, and the curved surface of all not mentioned relevant Trackpad is used.
In view of this; In comparatively advanced technology; Disclosed correlation technique relevant for the curved design of above-mentioned Trackpad, visible No. the 6654071st, United States Patent (USP), provide a kind of can free bending becomes curved soft capacitive touch control plate according to the arc curvature of display surface; Be used for being attached to the surface of described display, cause described display to possess touch controllable function; In addition, No. the 1479891st, Chinese patent (publication number) also provides a kind of bending capacitance touch pad, is between two bending rigid transparent fenders, to establish a functional membrane, and possesses the touch-control ability; Yet; The touch pads that No. the 1479891st, Trackpad that No. the 6654071st, United States Patent (USP) and Chinese patent all only can bend to the curved surface shape along one axial (like the longitudinal axis or the transverse axis of described Trackpad); And can't form have multiaxis to bending curve, and do not disclose the method for making of described Trackpad and touch pads; Therefore, desire is made into the curved surface shape with above-mentioned Trackpad, still exists many technical problems to be overcome that has.
In order to overcome the problems referred to above, No. 20080042997 announcement of United States Patent (USP) has a kind of curved surface shape resistor type touch control plate, mainly is earlier plano-polarized light plate and Trackpad to be accomplished applying, Polarizer and Trackpad added simultaneously to be pressed into the curved surface shape again; Its shortcoming is that described Polarizer and Trackpad are if pressurization is failed, and then the two all becomes waste material; And described Polarizer and Trackpad are to belong to the mutual fit-state of plural base material; Bend in the curved process in pressurization, cause the situation of the more weak base material generation local fracture of stress intensity easily, be easy to generate interference stripes simultaneously; And become the waste material that pressurization is failed, so demand urgently improving.
In addition; Existing plane Trackpad mostly with glass material as substrate; Because of it has good, scratch resistant, the wear-resisting and on-deformable characteristic of light penetration property than plastic material (like PET); If will glass substrate be processed the curved surface shape, glass substrate need carry out high temperature hot pressing to be bent to form curved surface shape glass substrate; Be the working temperature (650 to 750 degree Celsius approximately) that curved glass substrate need be high but make; And described flexible circuit board promptly can cracking under the working temperature of 300 degree Celsius approximately, so flexible circuit board obviously can't together be made into curved surface shape Trackpad with described planar glass substrate.
Summary of the invention
The problem of taking off for overcoming in the background technology, the present invention aims to provide a kind of method for making of camber-shaped capacitance type touch-control plate, especially utilizes the characteristic that is suitable for heating extension of plastic material, forms the described curved capacitive touch control plate that is with the system of moulding.
The method for making of camber-shaped capacitance type touch-control plate of the present invention comprises:
Provide one have the capacitance touching control function the flat flexible circuit board;
Utilize the compression molding mode that described flat flexible circuit board is compression molded into a curved flexible circuit board; And
Provide one to be curved substrate; And with excurvation curved surface of described curved surface shape flexible circuit board and described substrate one in flexure plane coupling is fitted; Form described camber-shaped capacitance type touch-control plate with assembly, reach the purpose that the system of moulding forms described camber-shaped capacitance type touch-control plate according to this.
Wherein, Described press moulding mode can be hot-forming or vacuum aided cold briquetting; So; Described flat flexible circuit board can form two dimension or three-dimension curved surface shape along one or more axial bending, and described two-dimentional curved surface shape flexible circuit board bilateral can be bent to form a curved side respectively, and described three-dimension curved surface shape flexible circuit board can be bent to form a curved side and a curved end face respectively.
In addition, the present invention comprises more:
Before described flexible circuit board and described substrate are fitted to coupling; Cut the unnecessary edge of described curved surface shape flexible circuit board; And print one and can cover the figure of described flexible circuit board, some literal or some symbols interior flexure plane at described substrate; A pressure-sensing glue, optics pressure-sensing glue or sensible heat glue fit subsequently at the interior flexure plane of described substrate, with the excurvation curved surface of the described flexible circuit board of adhering on the interior flexure plane of described substrate.
Wherein, The interior flexure plane of described substrate can be an inner sunken face; And the excurvation curved surface of described curved surface shape flexible circuit board can be an outer convex surface; The mode that described substrate and curved surface shape flexible circuit board are fitted to coupling can adhere on the inner sunken face of substrate with the outer convex surface of curved surface shape flexible circuit board according to design; Perhaps, the interior flexure plane of described substrate also can be convex surface in, and the excurvation curved surface of described curved surface shape flexible circuit board also can be an outer concave curved surface, adheres on the interior convex surface of substrate with the outer concave curved surface of curved surface shape flexible circuit board.
The structure of camber-shaped capacitance type touch-control plate of the present invention comprises:
One has the three-dimension curved surface shape flexible circuit board of capacitance touching control function, and tool is along one first curved side and one first curved end face of the bent compression molding of at least two axial arcs; And
The one three-dimension curved surface shape substrate that can supply touch, tool corresponds to one second curved side and one second curved end face of the arc-curved shape type body of said flexible circuit board, and each other coupling being fitted according to this is integral.
Wherein, first curved side of described flexible circuit board and first curved end face second curved side and second curved end face of described substrate of fitting respectively.The mode of described compression molding can be hot-forming or vacuum aided cold briquetting.
In addition, the present invention comprises more:
One interior flexure plane of described substrate is to be printed with one can cover the figure of described flexible circuit board, some literal or some symbols; And the interior flexure plane of described substrate is fit a pressure-sensing glue, optics pressure-sensing glue or sensible heat glue, with an excurvation curved surface of described flexible circuit board that coupling is fitted.
Wherein, the interior flexure plane of described substrate can be an inner sunken face, and the excurvation curved surface of described curved surface shape flexible circuit board can be an outer convex surface, and the outer convex surface of the inner sunken face of described substrate and described curved surface shape flexible circuit board is fitted to coupling and is integral; Perhaps; The interior flexure plane of described substrate also can be convex surface in; And the excurvation curved surface of described curved surface shape flexible circuit board also can be an outer concave curved surface, and the outer concave curved surface of the interior convex surface of described substrate and described curved surface shape flexible circuit board is fitted to coupling and is integral.
In addition, in above-mentioned method for making and structure, described substrate can be processed by transparent or non-transparent material, for example material such as glass material.
Compared with prior art, the beneficial effect that the present invention has is: the shape of capacitive touch control plate is controlled easily, and the difficulty of processing reduction, and production efficiency is improved, and product quality also can obtain to guarantee.
Description of drawings
Fig. 1 is the three-dimensional exploded view of the camber-shaped capacitance type touch-control plate of one embodiment of the invention;
Fig. 2 A is the cut-away view of sending in one embodiment of the invention in flexible circuit board to the die cavity;
Fig. 2 B relies on male model and master mold clamping and hot pressing flexible circuit board to form curved cut-away view in one embodiment of the invention;
Fig. 3 A sends the inner cut-away view of flexible circuit board to cold briquetting device in one embodiment of the invention;
Fig. 3 B relies on pull of vacuum and heater heats flexible circuit board to form curved cut-away view in one embodiment of the invention;
Fig. 4 uses in one embodiment of the invention to cut the cut-away view that mould cuts the unnecessary edge of curved surface shape flexible circuit board;
Fig. 5 is the cut-away view that the concave curved surface of utilization printing pair of rollers glass substrate in one embodiment of the invention prints;
Fig. 6 utilizes the cut-away view of coating roller to the concave curved surface coating glue-line of glass substrate in one embodiment of the invention;
Fig. 7 is the cut-away view of in one embodiment of the invention flexible circuit board and glass substrate being fitted to coupling;
Fig. 8 is the cut-away view of the camber-shaped capacitance type touch-control plate of one embodiment of the invention;
Fig. 9 is the cut-away view of sending in another embodiment of the present invention in flexible circuit board to the die cavity;
Figure 10 relies on male model and master mold clamping and hot pressing flexible circuit board to form curved cut-away view in another embodiment of the present invention;
Figure 11 uses in another embodiment of the present invention to cut the cut-away view that mould cuts the unnecessary edge of curved surface shape flexible circuit board;
Figure 12 is the cut-away view of in another embodiment of the present invention flexible circuit board and glass substrate being fitted to coupling;
Figure 13 is the cut-away view of the camber-shaped capacitance type touch-control plate of another embodiment of the present invention;
Figure 14 is the stereographic map of sending in yet another embodiment of the invention in flexible circuit board to the die cavity;
Figure 15 is the cut-away view of sending in yet another embodiment of the invention in flexible circuit board to the die cavity;
Figure 16 relies on male model and master mold clamping and hot pressing flexible circuit board to form curved stereographic map in yet another embodiment of the invention;
Figure 17 relies on male model and master mold clamping and hot pressing flexible circuit board to form curved cut-away view in yet another embodiment of the invention;
Figure 18 uses in yet another embodiment of the invention to cut the cut-away view that mould cuts the unnecessary edge of curved surface shape flexible circuit board;
Figure 19 is the cut-away view of the camber-shaped capacitance type touch-control plate of yet another embodiment of the invention;
Figure 20 is the stereographic map of the camber-shaped capacitance type touch-control plate of yet another embodiment of the invention;
Figure 21 A is the front view of Figure 20 embodiment;
Figure 21 B is the left side view of Figure 21 A;
Figure 21 C is the right side view of Figure 21 A;
Figure 21 D is the vertical view of Figure 21 A;
Figure 21 E is the upward view of Figure 21 A;
Figure 22 is the cut-away view of the concave curved surface shape capacitive touch control plate of further embodiment of this invention.
Embodiment
See also Fig. 1, disclose the three-dimensional exploded view of one embodiment of the invention, and cooperate Fig. 2 A to Fig. 8 that the method for making of camber-shaped capacitance type touch-control plate of the present invention is described, comprise the following step:
(1) provide one have the capacitance touching control function flat flexible circuit board 10 (shown in Fig. 2 A).
(2) utilize the described flat flexible circuit board 10 of press moulding mode curved surface forming; Described press moulding mode can be hot-forming in this enforcement; Mainly be that described flat flexible circuit board 10 is delivered in the die cavity 40 of 42 of a male model 41 and master molds of a heat pressing forming device 4 (shown in Fig. 2 A); Described male model 41 is heated to a preset temperature (200 to 250 degree Celsius approximately) in advance with master mold 42, and described preset temperature is can be with the temperature of described flat flexible circuit board 10 thermoplastic shapings; So; Can rely on described male model 41 and master mold 42 clampings and the described flat flexible circuit board 10 of hot pressing; Be two-dimentional curved flexible circuit board 1 (shown in Fig. 2 B) to mould the described flat flexible circuit board 10 of system along an axial bending formation one; And make described curved surface shape flexible circuit board 1 have flexure plane 12 in an excurvation curved surface 11 and; The wherein said y direction that axially in this enforcement, can be described flat flexible circuit board 10, and described curved surface shape flexible circuit board 1 bilateral forms a unnecessary edge 14 respectively.
(3) use cuts the unnecessary edge 14 (as shown in Figure 4) that mould 5 (for example cutter) cuts described curved surface shape flexible circuit board 1 respectively.
(4) with molding modes such as mould molding or high temperature hot pressing; Provide one to be two-dimentional curved glass substrate 2 (as shown in Figure 5); And making described curved surface shape glass substrate 2 have flexure plane 22 in the excurvation curved surface 21 that can supply touch and, wherein said glass substrate 2 can be transparent or nontransparent material kenel.
(5) utilize a printing roller 61, can cover the figure (for example virtual key) of described curved surface shape flexible circuit board 1, some literal or some symbols (as shown in Figure 5) in interior flexure plane 22 printings one of described glass substrate 2; So, can omit above-mentioned tradition and set up physical button and art designing's seam, be beneficial to the curved design on described surface at the touch-control product surface.
(6) utilize a coating roller 62 subsequently, at figure, literal or symbol surface coated one glue-line 3 (as shown in Figure 6) of the interior flexure plane 22 of described glass substrate 2, described glue-line 3 can be pressure-sensing glue, optics pressure-sensing glue or sensible heat glue in this enforcement.
(7) with the excurvation curved surface of described curved surface shape flexible circuit board 1 11 and 22 pairs of couplings of interior flexure plane of described glass substrate 2 fit (like Fig. 1 and shown in Figure 7); On the interior flexure plane 22 of glass substrate 2 (as shown in Figure 8), assembly according to this forms two-dimentional camber-shaped capacitance type touch-control plate 20 with the excurvation curved surface 11 of adhesion curved surface shape flexible circuit board 1.
Know according to above-mentioned; The present invention is a heating extension characteristics of utilizing described flat flexible circuit board 10; Axially carry out the hot pressing bending to described flat flexible circuit board 10 along one earlier; And the described two-dimentional curved surface shape flexible circuit board 1 of moulding, and be fitted on the described two-dimentional curved surface shape glass substrate 2, to form the described two-dimentional curved capacitive touch control plate 20 that is.
In addition; Above-mentioned press moulding mode also can be vacuum aided cold briquetting; Shown in Fig. 3 A, be that described flat flexible circuit board 10 is delivered to a vacuum aided cold briquetting device 7 inside, and be placed in a male model 71 end faces of described cold briquetting device 7 inside; Described male model 71 end faces have plural pore 72, and male model 71 tops are provided with a well heater 73; So; Can vacuumize via 72 pairs of described cold briquetting devices of each pore, 7 inside; And make described cold briquetting device 7 inside form vacuum states; Impel described flexible circuit board 10 attracted by the pull of vacuum of described pore 72 and be fitted in male model 71 end faces, during be fitted in male model 71 end faces via 73 pairs of described well heaters flexible circuit board 10 evenly heat, make described flat flexible circuit board 10 and form two-dimentional curved flexible circuit board 1 (shown in Fig. 3 B) to mould along an axial bending; All the other configuration and making step are the embodiment that is similar to above-mentioned Fig. 1 to Fig. 8, run over simplified illustration at this.
In the above-described embodiments; Described Trackpad 20 can be incorporated into the surface of display panel (Display Panel), electronic product or equipment; Cause the surface (cooperate shown in Figure 8) of interior flexure plane 12 contacts of described curved surface shape flexible circuit board 1 at display panel, electronic product or equipment; Or hide the internal electron member of described display panel, electronic product or equipment; The user can touch the excurvation curved surface 21 of the glass substrate 2 of described Trackpad 20, impels between described curved surface shape flexible circuit board 1 and the human body to produce capacity effect, accepts the coordinate of touch position to calculate described glass substrate 2.
See also Fig. 9 to Figure 13, disclose the configuration schematic diagram of the making step of another embodiment of the present invention, the method for making of another two-dimentional camber-shaped capacitance type touch-control plate of the present invention is described; Wherein, Described flat flexible circuit board 10a is a male model 41a and the die cavity 40a between a master mold 42a interior (as shown in Figure 9) that is delivered to a heat pressing forming device 4a; Rely on described male model 41a and master mold 42a clamping and the described flat flexible circuit board of hot pressing 10a; Be two-dimentional curved flexible circuit board 1a (shown in figure 10) to mould the described flat flexible circuit board 10a of system along an axial bending formation one; Wherein, The described y direction that axially in this enforcements, also can be described flat flexible circuit board 10a, described curved surface shape flexible circuit board 1a tool one an excurvation curved surface 11a and an interior flexure plane 12a, and described curved surface shape flexible circuit board 1a bilateral respectively bending form a curved side 13a; Each self-forming one unnecessary edge 14a of described curved side 13a, each edge 14a can accept the described mould 5a that cuts respectively and cut (shown in figure 11).
Subsequently; Provide one to be two-dimentional curved glass substrate 2a (shown in figure 12); Flexure plane 22a in the excurvation curved surface 21a that described glass substrate 2a tool one can supply touch and, and the also corresponding bending respectively of described glass substrate 2a bilateral forms a curved side 23a; So; The excurvation curved surface 11a of described curved surface shape flexible circuit board 1a and the interior flexure plane 22a of described glass substrate 2a are fitted to coupling; With the excurvation curved surface 11a of adhesion curved surface shape flexible circuit board 1a on the interior flexure plane 22a of glass substrate 2a (shown in figure 13); And the curved side 13a of described curved surface shape flexible circuit board 1a and the curved side 23a of described glass substrate 2a fit; Assembly according to this forms two-dimentional camber-shaped capacitance type touch-control plate 20a, and all the other configuration and making step are the embodiment that is similar to above-mentioned Fig. 1 to Fig. 8, run over simplified illustration at this.
In view of the above; Earlier described flat flexible circuit board 10a hot pressing is bent to form two-dimentional curved flexible circuit board 1a; Be fitted in again on the described two young curved surface shape glass substrate 2a, form the described two-dimentional curved capacitive touch control plate 20a that is, make described Trackpad 20a increase two curved side 23a that can accept touch-control than the conventional planar Trackpad with the system of moulding; So significantly promote the comprehensive of touch-control, and significantly promote the advantage of touch-control product on curved design.
See also Figure 19 and Figure 20, disclose the cut-away view of yet another embodiment of the invention, the structure of three-dimension curved surface shape capacitive touch control plate 20b of the present invention is described, comprise the three-dimension curved surface shape glass substrate 2b that a three-dimension curved surface shape flexible circuit board 1b and can supply touch.Wherein, Described curved surface shape flexible circuit board 1b has the capacitance touching control function; And curved surface shape flexible circuit board 1b tool is along the one first curved side 13b and the one first curved end face 15b of at least two bent compression moldings of axial arc; The described first curved side 13b and the first curved end face 15b all can be plural number in this enforcement, and the described longitudinal axis and the X direction that axially in this enforcement, can be described flexible circuit board 1b; Described glass substrate 2b tool is same as the one second curved side 23b and the one second curved end face 25b of the arc-curved shape type body of said curved surface shape flexible circuit board 1b.
In addition, described curved surface shape flexible circuit board 1b still has an excurvation curved surface 11b, has a flexure plane 22b in one and described glass substrate 2b is also corresponding; So; Two curved surface 11b, 22b fit to coupling to be integral, and cause the described first curved side 13b described second curved side 23b that fits, and the described first curved end face 15b described first curved end face 25b that fits; All the other printed patterns, glue-line configuration are to be similar to the foregoing description, run over simplified illustration at this.
See also Figure 14 to Figure 19, disclose the configuration schematic diagram of the making step of above-mentioned Trackpad 20b structure, the method for making of three-dimension curved surface shape capacitive touch control plate of the present invention is described; Wherein, Described flat flexible circuit board 10b is a male model 41b and the die cavity 40b between a master mold 42b interior (like Figure 14 and shown in Figure 15) that is delivered to a heat pressing forming device 4b; Rely on described male model 41b and master mold 42b clamping and the described flat flexible circuit board of hot pressing 10b; To mould the described flat flexible circuit board 10b of system forms the three-dimension curved surface shape along described two axial bendings flexible circuit board 1b (like Figure 16 and shown in Figure 17); Cause described curved surface shape flexible circuit board 1b to form flexure plane 12b in described excurvation curved surface 11b and; And described curved surface shape flexible circuit board 1b bilateral bending respectively forms the described first curved side 13b; Simultaneously described curved surface shape flexible circuit board 1b both-end also respectively bending form the described first curved end face 15b, each self-forming one unnecessary edge 141b of described side 13b and end face 15b, 142b, each edge 141b, 142b can accept the described mould 5b that cuts respectively and cut (shown in figure 18).
Subsequently; The described glass substrate 2b (shown in figure 19) that is the three-dimension curved surface shape is provided; Have the excurvation curved surface 21b that can supply touch and described in flexure plane 22b; And described glass substrate 2b bilateral bending respectively forms the described second curved side 23b, described glass substrate 2b both-end also respectively bending form the described second curved end face 25b (cooperating shown in Figure 20).
So; Can the excurvation curved surface 11b of described curved surface shape flexible circuit board 1b and the interior flexure plane 22b of described glass substrate 2b be fitted to coupling; With the excurvation curved surface 11b of adhesion flexible circuit board 1b on the interior flexure plane 22b of glass substrate 2b; Cause the described first curved side 13b to fit with the described second curved side 23b in the lump; Described first curved end face 15b and the described second curved end face 25b also fit in the lump, and assembly according to this forms three-dimension curved surface shape capacitive touch control plate 20b.All the other making steps are to be similar to the foregoing description, run over simplified illustration at this.
Please remerge with reference to Figure 19~Figure 21; But Touch Zone 161b, 162b and the 163b (shown in Figure 21 A to Figure 21 E) of the excurvation curved surface 21b of wherein above-mentioned glass substrate 2b, the second curved side 23b and the described curved surface shape of second each self-forming of curved end face 25b flexible circuit board 1b; More described Touch Zone is the virtual key that provides the user to operate, and so replaces traditional physical button.
In view of the above; Form the described capacitive touch control plate 20b that is the three-dimension curved surface shape with the system of moulding; And described Trackpad 20b increases two curved side 23b and two curved end face 25b that can accept touch-control that can accept touch-control than the conventional planar Trackpad, to form the capacitive touch control plate 20b that five faces all have the Touch Zone, not only significantly promotes the convenience of touch-control; And also significantly promote the advantage of touch-control product on curved design, for example reduce the design of art designing's seam.
Wherein, In above-mentioned all embodiment; It is an inner sunken face (like Fig. 8, Figure 13 and shown in Figure 19) that the present invention discloses described glass substrate 2,2a, the interior flexure plane 22 of 2b, 22a, 22b; And described curved surface shape flexible circuit board 1,1a, the excurvation curved surface 11 of 1b, 11a, 11b are outer convex surfaces; The outer convex surface of the inner sunken face of described glass substrate 2,2a, 2b and described curved surface shape flexible circuit board 1,1a, 1b is fitted to coupling, with the outer convex surface of adhere described curved surface shape flexible circuit board 1,1a, 1b on the inner sunken face of described glass substrate 2,2a, 2b, to form the two-dimentional formula capacitive touch control plate of a convex surface shape.
In another preferred embodiment of the present invention (shown in figure 22); The interior flexure plane 22c that then discloses described glass substrate 2c is a convex surface in; And the excurvation curved surface 11c of described curved surface shape flexible circuit board 1c is an outer concave curved surface; The outer concave curved surface of the interior convex surface of described glass substrate 2c and described curved surface shape flexible circuit board 1c is fitted to coupling; With the outer concave curved surface of the described curved surface shape flexible circuit board 1c that adheres on the interior convex surface of described glass substrate 2c, to form the two-dimentional formula capacitive touch control plate 20c of a concave curved surface shape.
More than explanation is just illustrative for the purpose of the present invention; And nonrestrictive, those of ordinary skills understand, under the situation of spirit that does not break away from claim and limited and scope; Can make many modifications, variation or equivalence, but all will fall within protection scope of the present invention.