CN109032424B - Touch panel, preparation method and touch display device - Google Patents
Touch panel, preparation method and touch display device Download PDFInfo
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- CN109032424B CN109032424B CN201811033825.8A CN201811033825A CN109032424B CN 109032424 B CN109032424 B CN 109032424B CN 201811033825 A CN201811033825 A CN 201811033825A CN 109032424 B CN109032424 B CN 109032424B
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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
- G06F3/0412—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 discloses a touch panel, a preparation method and a touch display device thereof, wherein the touch panel comprises a substrate, a conducting layer and a flexible circuit board, and the peripheral area of the conducting layer comprises a wiring area and at least one connecting terminal area; the wiring area is provided with a plurality of signal wirings extending to the display area; the connection terminal area is provided with at least one first connection terminal and at least one second connection terminal; the first connecting terminals are electrically connected with the signal wires one by one, and the second connecting terminals are insulated from the signal wires; the flexible circuit board comprises at least one functional connection line and at least one suspension connection line, the at least one functional connection line is electrically connected with the at least one first connection terminal, and the at least one suspension connection line is electrically connected with the at least one second connection terminal. According to the touch panel, the preparation method and the touch display device, the unified flexible circuit board can be adopted to be matched with the connecting terminal of the touch panel, so that the die sinking cost of the flexible circuit board is reduced, and the processing efficiency is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a touch panel, a preparation method and a touch display device.
Background
With the rapid development of display panels, display panels with narrow bezel have undoubtedly played an important role in the appearance.
The realization of the narrow-frame touch display panel necessarily requires that signal wires of the touch display panel are led out in a segmented manner, so that the wiring of the signal wires in a frame area is reduced, and the wiring area of the signal wires is reduced. And the signal wiring of the segmented outgoing line is connected with the flexible circuit board in a pressing way through the connecting terminal, and the integrated chip connected on the flexible circuit board can transmit electric signals to the signal wiring. Obviously, the integrated chip functions corresponding to and connected with different connecting terminals are different, so the number of pins in the integrated chip is different, and the definition of the pins is also different, so the positions of the suspension pins in the integrated chip with different functions are also different, and for the suspension pins in the integrated chip, a connection channel is not usually selected to be arranged on the flexible circuit board, so different flexible circuit boards can be designed corresponding to different suspension pin positions, and further, when the flexible circuit board is pressed on the connecting terminals, the corresponding adapter plate and the hot pressing tool bit need to be adopted. Obviously, corresponding to the integrated chips with different functions, the design and purchase of the corresponding flexible circuit board, the adapter plate and the hot-pressing tool bit can increase the die sinking cost of the flexible circuit board, reduce the efficiency of the manufacturing process and reduce the competitiveness of the product.
Disclosure of Invention
The invention provides a touch panel, a preparation method and a touch display device, which adopt a uniform flexible circuit board to adapt to a connecting terminal of the touch panel, reduce the die sinking cost of the flexible circuit board and improve the efficiency of the manufacturing process.
In a first aspect, an embodiment of the present invention provides a touch panel, including:
the display device comprises a substrate base plate and a conducting layer positioned on one side of the substrate base plate, wherein the conducting layer comprises a display area and a peripheral area surrounding the display area, and the peripheral area comprises a wiring area and at least one connecting terminal area; the wiring area is provided with a plurality of signal wirings extending to the display area; the connecting terminal area is provided with at least one first connecting terminal and at least one second connecting terminal; the first connecting terminals are electrically connected with the signal wires one by one, and the second connecting terminals are insulated from the signal wires;
the flexible circuit board comprises at least one functional connecting line and at least one suspension connecting line, the at least one functional connecting line is electrically connected with the at least one first connecting terminal, and the at least one suspension connecting line is electrically connected with the at least one second connecting terminal;
optionally, at least one end of the second connection terminal close to the signal trace is provided with a dividing line, and the dividing line insulates the second connection terminal from the signal trace.
Optionally, the first connection terminals and the second connection terminals are arranged in a single row array.
Optionally, the peripheral region of the conductive layer includes a transparent conductive layer and an ink conductive layer, and the ink conductive layer is located on a side of the transparent conductive layer away from the substrate.
Optionally, the connection terminal area further comprises at least one third connection terminal.
Optionally, the ink conductive layer further includes alignment marks, and the alignment marks are located at two ends of the connection terminal area.
Optionally, the signal traces include touch signal traces.
In a second aspect, an embodiment of the present invention further provides a method for manufacturing a touch panel, including:
providing a substrate base plate;
preparing a conductive layer on one side of the substrate base plate, wherein the conductive layer comprises a display area and a peripheral area surrounding the display area, and the peripheral area comprises a wiring area and at least one connecting terminal area; the wiring area is provided with a plurality of signal wirings extending to the display area; the connecting terminal area is provided with at least one first connecting terminal and at least one second connecting terminal; the first connecting terminals are electrically connected with the signal wires one by one, and the second connecting terminals are insulated from the signal wires;
providing a flexible circuit board, wherein the flexible circuit board comprises at least one functional connecting wire and at least one suspension connecting wire;
electrically connecting the at least one first connection terminal with the at least one functional connection trace; and electrically connecting the at least one second connecting terminal with the at least one suspended connecting trace.
Optionally, the preparing a conductive layer on one side of the substrate base plate includes:
preparing a transparent conductive layer on one side of the substrate base plate;
and preparing an ink conducting layer on one side of the transparent conducting layer, which is far away from the substrate.
Optionally, preparing a conductive layer on one side of the substrate base plate, where the conductive layer includes a display area and a peripheral area surrounding the display area, and the peripheral area includes a routing area and at least one connection terminal area; the wiring area is provided with a plurality of signal wirings extending to the display area; the connecting terminal area is provided with at least one first connecting terminal and at least one second connecting terminal; wherein, first connecting terminal with signal is walked the line electricity one-to-one, second connecting terminal with signal is walked the line insulation, includes:
performing laser cutting on the ink conducting layer and the transparent conducting layer in the wiring area to obtain a plurality of signal wirings;
performing laser cutting on the ink conducting layer and the transparent conducting layer in the connecting terminal area to obtain at least one first connecting terminal and at least one second connecting terminal;
performing laser cutting on the at least one second connecting terminal along a direction forming a preset included angle with the extending direction of the second connecting terminal so as to insulate the second connecting terminal from the signal routing; wherein the preset included angle is alpha, and the alpha is more than 0 degree and less than or equal to 90 degrees.
Optionally, the preparing an ink conductive layer on a side of the transparent conductive layer facing away from the substrate includes:
printing an ink conducting layer on one side, away from the substrate base plate, of the transparent conducting layer through screen printing, wherein the ink conducting layer located on the connecting terminal area comprises a plurality of connecting terminals arranged in a single-row array.
Optionally, the preparing the ink conductive layer on the side of the transparent conductive layer facing away from the substrate includes:
and forming an ink conducting layer on one side of the transparent conducting layer, which is far away from the substrate base plate, through a photoetching process, wherein the ink conducting layer positioned at the connecting terminal area comprises a plurality of connecting terminals which are arranged in a single row array.
Optionally, the ink conductive layer further includes alignment marks located at two ends of the connection terminal area;
said electrically connecting said at least one first connection terminal with said at least one functional connection trace; electrically connect the at least one second connection terminal with the at least one suspended connection routing, including:
coating anisotropic conductive paste at the first connection terminal and the second connection terminal, respectively;
and aligning and laminating the functional connecting wire and the first connecting terminal according to the position of the alignment mark, and aligning and laminating the suspended connecting wire and the second connecting terminal.
In a third aspect, an embodiment of the present invention further provides a touch display device, including the touch panel according to any one of the first aspect.
According to the touch panel, the preparation method and the touch display device, the die sinking cost of the flexible circuit board is reduced, the efficiency of the touch panel manufacturing process is improved, the manufacturing cost of the touch panel is reduced, and the competitiveness of products is improved.
Drawings
FIG. 1 is a schematic structural diagram of a touch panel in the prior art;
FIG. 2 is a partial enlarged view of FIG. 1 at b;
FIG. 3 is an enlarged view of a portion of FIG. 1 at d;
fig. 4 is a schematic structural diagram of a touch panel according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view along AA' of FIG. 4;
FIG. 6 is a partially enlarged view of a peripheral region of the touch panel shown in FIG. 4;
FIG. 7 is an enlarged fragmentary view within the dashed box of FIG. 6;
fig. 8 is a cross-sectional structure view of another touch panel according to an embodiment of the invention;
FIG. 9 is a partially enlarged view of a peripheral region of the touch panel shown in FIG. 8;
FIG. 10 is a schematic cross-sectional view taken along section line BB' of FIG. 9;
fig. 11 is a flowchart of a method for manufacturing a touch panel according to an embodiment of the present invention;
fig. 12 is a schematic diagram of a pattern of a screen printing plate for screen printing an ink conductive layer according to an embodiment of the present invention;
fig. 13 is a flowchart of a method for manufacturing a touch panel according to another embodiment of the present invention;
fig. 14 is a flowchart of a method for manufacturing a touch panel according to another embodiment of the present disclosure;
fig. 15 is a schematic view of a laser cutting line on the second connection terminal according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings, not all of them.
Fig. 1 is a schematic structural diagram of a touch panel in the prior art, fig. 2 is a partial enlarged view of a position b shown in fig. 1, fig. 3 is a partial enlarged view of a position d shown in fig. 1, and fig. 1-3 are referenced, wherein the touch panel shown in fig. 1 includes a plurality of flexible circuit boards connected to connection terminals respectively located at positions b, c, d, and e, where the flexible circuit board at position b and the flexible circuit board at position c are touch driving flexible circuit boards, and the flexible circuit board at position d and the flexible circuit board at position e are touch sensing flexible circuit boards. In a touch driving chip and a touch sensing chip (not shown in the figure) generally connecting the touch driving flexible circuit board and the touch sensing flexible circuit board, some pins may have no function, that is, there may be a suspension pin in the chip, and when the flexible circuit board is connected to a connection terminal on the touch panel through the flexible circuit board, the flexible circuit board may select that no connection trace is set at a position corresponding to the suspension pin of the touch chip, that is, the channel is suspended, for example, the flexible circuit board shown in fig. 2 and a blank area in the channel of the flexible circuit board shown in fig. 3, at this time, the connection terminal corresponding to the suspension channel is a suspension connection terminal NC. The connection terminal area of the touch panel includes a driving connection terminal TX connected to a driving pin of the touch chip, a sensing connection terminal RX connected to a sensing pin of the touch chip, and a ground connection terminal GND connected to a ground pin of the touch chip, in addition to the floating connection terminal NC.
Obviously, because the programs in each touch driving chip and each touch sensing chip are different, the number of the suspension pins of each touch chip may be different, and the positions of the suspension pins may also be different, it is obvious that the flexible circuit board corresponding to the suspension pins needs to be designed and manufactured for different touch chips, and when the flexible circuit board is pressed with the connection terminal area in the touch panel, the corresponding adapter board, the hot-pressing tool bit and the like also need to be customized, so that the manufacturing process of the touch panel is increased by designing and manufacturing the flexible circuit board corresponding to various touch chips undoubtedly, and the manufacturing cost is increased at the same time.
An embodiment of the invention provides a touch panel, fig. 4 is a schematic structural view of a touch panel provided by an embodiment of the invention, fig. 5 is a schematic structural view of a cross section along AA' of fig. 4, fig. 6 is a partially enlarged view of a peripheral area of the touch panel shown in fig. 4, fig. 7 is a partially enlarged view within a dotted frame of fig. 6, and referring to fig. 4-7, the touch panel includes: a substrate 11 and a conductive layer 12 located on one side of the substrate 11, wherein the conductive layer 12 includes a display area 100 and a peripheral area 200 surrounding the display area 100, and the peripheral area 200 includes a routing area 210 and at least one connection terminal area 220; the wiring area 210 is provided with a plurality of signal wirings 211 extending to the display area 100; the connection terminal area 220 is provided with at least one first connection terminal 221 and at least one second connection terminal 222; the first connection terminals 221 are electrically connected to the signal traces 211 one by one, and the second connection terminals 222 are insulated from the signal traces 211; the flexible printed circuit board 14 is further included, and the flexible printed circuit board 14 includes at least one functional connection trace 141 and at least one suspension connection trace 142; the at least one functional connection trace 141 and the at least one first connection terminal 221 are electrically connected; at least one second connection trace 142 and at least one second connection terminal 222.
Referring to fig. 7, the black dividing line 20 separates and insulates the first connection terminal 221 and the second connection terminal 222, that is, the white terminal between the black dividing lines 20 is the first connection terminal 221 or the second connection terminal 222, the signal trace 211 of the trace area 210 is the white line between the black dividing lines 21, and referring to fig. 7, the white first connection terminal 221 and the white signal trace 211 are electrically connected one by one. The connection trace on the flexible printed circuit 14 can be divided into the functional connection trace 141 and the suspension connection trace 142 according to the connection relationship corresponding to the first connection terminal 221 and the second connection terminal 222, or the corresponding connection relationship corresponding to the functional pin and the suspension pin, for example, the connection trace in the dashed frame area of the flexible printed circuit in fig. 6 is the suspension connection trace 142, which is connected to the second connection terminal 222, and the functional connection trace 141 and the suspension connection trace 142 constitute the full-channel connection trace of the flexible printed circuit 14. According to the touch panel provided by the embodiment of the invention, the suspended connection routing corresponding to the flexible circuit board is adopted, the at least one second connecting terminal insulated from the signal routing is arranged in the connecting terminal area, and the second connecting terminal is connected with the suspended connection routing, so that the flexible circuit board can adopt the flexible circuit board with a uniform full channel, and meanwhile, the suspended connection routing of the flexible circuit board is not electrically connected with the signal routing, and the problems that different flexible circuit boards are required to be designed and purchased corresponding adapter plates and hot pressing tool bits are required to be pressed corresponding to integrated chips with different numbers and positions of suspended pins are solved.
With reference to fig. 7, there are various ways to insulate the second connection terminal 222 from the signal trace 221, and a dividing line 22 may be disposed at least at one end of the second connection terminal 222 close to the signal trace 211, where the dividing line 22 insulates the second connection terminal 222 from the signal trace 211.
Since the second connection terminal 222 and the floating connection trace on the flexible printed circuit board are generally connected by pressing, referring to fig. 7, the dividing line 22 is disposed on the upper portion of the second connection terminal 222, so as to ensure that the floating connection trace on the flexible printed circuit board is still insulated from the signal trace 221 even though the second connection terminal 222 is connected to the floating connection trace. In addition to the division line 22 only at the end of the second connection terminal 222 close to the signal trace 211, the division line can be disposed at the end of the second connection terminal 222 far from the signal trace 211, so as to completely isolate the second connection terminal 222. It should be noted that the insulation manner between the second connection terminal 222 and the signal trace 211 is not limited to setting dividing lines at the upper and lower positions of the second connection terminal 222, and the conductive layer in the area where the second connection terminal 222 is located may also be directly removed through denser dividing lines in the process of performing the insulation step between the second connection terminal and the signal trace, that is, the conductive layer is not set in the area, and the second connection terminal is not set, so that it is ensured that the second connection trace on the flexible circuit board is not electrically connected to the signal trace 211, and no limitation is made here.
In the touch panel provided in the embodiment of the present invention, the signal traces 211 in the trace area 210 are touch signal traces, and for example, for the touch panel, the signal traces connected to the connection terminal areas 220 are touch signal traces, and the other ends of the connection terminals are connected to the touch chip, further, different connection terminal areas 220 can be respectively connected to the touch driving signal lines and the touch sensing signal lines, and the other ends of the corresponding connection terminals are respectively connected to the touch driving chip and the touch sensing chip. For a touch display panel integrating a touch function into the display panel, the signal traces 211 in the trace area 210 may also be data signal traces and scan signal traces for display.
With continued reference to fig. 6, optionally, the plurality of first connection terminals 221 and the plurality of second connection terminals 222 connecting the terminal area 220 are arranged in a single row array. By arranging the first connecting terminals 221 and the second connecting terminals 222 in a single-row array, when the flexible circuit board of the whole channel is pressed on the connecting terminals, the flexible circuit board can be in one-to-one correspondence with the connecting wires on the flexible circuit board, and one-time pressing is performed, so that electric connection is realized.
Fig. 8 is a cross-sectional structural view of another touch panel according to an embodiment of the invention, fig. 9 is a partially enlarged view of a peripheral area of the touch panel shown in fig. 8, and fig. 10 is a cross-sectional structural view of fig. 9 along a section line BB', and referring to fig. 8-10, optionally, the peripheral area of the conductive layer 12 includes a transparent conductive layer 121 and an ink conductive layer 122, and the ink conductive layer 122 is located on a side of the transparent conductive layer 121 away from the substrate 11. The first connection terminal 221 and the second connection terminal 222 in the connection terminal area 220 in the peripheral area 200 are both composed of a transparent conductive layer 121 and an ink conductive layer 122 which are laminated, wherein in the process of laminating the first connection terminal 221 and the second connection terminal 222 with a flexible circuit board to realize electrical connection, the positions of the first connection terminal 221 and the second connection terminal 222 in direct electrical contact with the flexible circuit board are the ink conductive layer 122, and the transparent conductive layer 121 of the connection terminal is electrically connected with the flexible circuit board through the ink conductive layer 122, so that the problem of large impedance in direct connection can be avoided, the resistance of the connection terminal connected with the flexible circuit board is reduced, and the conductivity of the connection terminal can be increased to a certain extent. The material of the conductive ink layer 122 is preferably conductive silver paste. The material of the transparent conductive layer 121 can be selected from a transparent metal oxide film such as indium tin oxide, or nano silver wires and metal grids.
With continued reference to fig. 9, optionally, the connection terminal area 220 further includes a plurality of third connection terminals 223, where the third connection terminals 223 are only formed by the ink conductive layer 122, the third connection terminals 223 are formed simultaneously with the ink conductive layer 122 in the first conductive terminal 221 and the second conductive terminal 222, and no connection trace is disposed on the flexible printed circuit board at a position corresponding to the third connection terminals 223.
Referring to fig. 6 and 9, optionally, ink conductive layer 122 further includes alignment marks 224, and alignment marks 224 are located at two ends of connection terminal area 220. The alignment mark 224 corresponds to an alignment mark on the flexible printed circuit board, and in the process of pressing the flexible printed circuit board to the connection terminal area 220 to electrically connect the functional connection trace 141 and the floating connection trace 142 on the flexible printed circuit board with the first connection terminal 221 and the second connection terminal 222 of the connection terminal area 220, a strict alignment electrical connection needs to be ensured so that the signal input is correct, and therefore, the alignment mark 224 can be formed simultaneously when the connection terminal is arranged on the ink conductive layer 122.
An embodiment of the present invention further provides a method for manufacturing a touch panel, fig. 11 is a flowchart of the method for manufacturing a touch panel according to the embodiment of the present invention, and referring to fig. 11, the method for manufacturing a touch panel includes:
s110, providing a substrate base plate;
the substrate may be a rigid substrate such as glass, or a flexible substrate such as PI or PET, and is not limited herein.
S120, preparing a conducting layer on one side of the substrate, wherein the conducting layer comprises a display area and a peripheral area surrounding the display area, and the peripheral area comprises a wiring area and at least one connecting terminal area; the wiring area is provided with a plurality of signal wirings extending to the display area; the connection terminal area is provided with at least one first connection terminal and at least one second connection terminal; the first connecting terminals are electrically connected with the signal wires one by one, and the second connecting terminals are insulated from the signal wires;
referring to fig. 4 and 5, the conductive layer may be prepared by various processes, for example, a photolithography process, a mask evaporation process, a vapor deposition process, a screen printing process, a laser etching process, etc., without limitation, different mask plates may be designed corresponding to different processes to form the patterns shown in the figures, wherein the second connection terminal 222 is disposed in the connection terminal region 220, and the second connection terminal 222 and the signal trace 211 are insulated from each other and may be simultaneously formed in the step of forming the first connection terminal 221.
S130, providing a flexible circuit board which comprises at least one functional connecting wire and at least one suspension connecting wire;
with reference to fig. 6, it should be noted that the positions and the number of the second connection terminals 222 are determined by the structural design of the touch electrodes of the touch panel, the touch driving program in the ic, and the like, and specifically may be determined by the number of the channels of the electrodes in the touch area or the positions and the number of the floating pins in the ic, for example, the second connection terminals 222 at the connection terminal area 220 are electrically connected to the floating pins of the ic through the floating connection traces 142 in the flexible printed circuit board.
S140, electrically connecting at least one first connecting terminal with at least one functional connecting wire; and electrically connecting the at least one second connecting terminal with the at least one suspended connecting wire.
Specifically, the process of electrically connecting the functional connection trace 141 and the floating connection trace 142 on the flexible circuit board with the first connection terminal 221 and the second connection terminal 222 may be a thermal compression process, and the functional connection trace 141 and the floating connection trace 142 are electrically connected with the first connection terminal 221 and the second connection terminal 222 one by one through alignment and compression steps.
According to the preparation method of the touch panel provided by the embodiment of the invention, at least one second connecting terminal insulated from the signal wiring is arranged in the connecting terminal area corresponding to the suspension connecting wiring of the flexible circuit board, and the second connecting terminal is connected with the suspension connecting wiring, so that the flexible circuit board can adopt a uniform full-channel flexible circuit board, and meanwhile, the suspension connecting wiring of the flexible circuit board is not electrically connected with the signal wiring, and the problems that different flexible circuit boards are required to be designed and purchased corresponding adapter plates and hot-pressing tool bits are required to be adopted to perform pressing corresponding to integrated chips with different numbers and positions of suspension pins are solved.
Optionally, S120, preparing a conductive layer on one side of the substrate, includes: preparing a transparent conducting layer on one side of a substrate; and preparing the ink conducting layer on the side of the transparent conducting layer, which is far away from the substrate.
With reference to fig. 8-10, a connection terminal is formed in the connection terminal area of the transparent conductive layer 122, and then when the connection terminal is directly connected to the connection trace of the flexible printed circuit board, there is a problem of large impedance, and by forming a layer of ink conductive layer 122 on the transparent conductive layer 121, the connection terminal is formed, so that it can be ensured that the resistance of the connection between the connection terminal and the flexible printed circuit board is small, and the conductivity of the connection terminal is increased to a certain extent.
Optionally, the preparing the ink conductive layer on the side of the transparent conductive layer facing away from the substrate includes: and printing an ink conducting layer on one side of the transparent conducting layer, which is far away from the substrate base plate, through screen printing, wherein the ink conducting layer positioned at the connecting terminal area comprises a plurality of connecting terminals which are arranged in a single row array.
Fig. 12 is a schematic diagram of a pattern of a screen printing plate of an ink conductive layer according to an embodiment of the present invention, and referring to fig. 12, a pattern corresponding to the pattern of the screen printing plate may be directly formed in a forming process of the ink conductive layer, where the pattern includes a pattern of a plurality of connection terminals arranged in a single row array.
Alternatively, the ink conductive layer is prepared on the side of the transparent conductive layer, which is away from the substrate, and the ink conductive layer is formed by using a photolithography process, and a plurality of connection terminals arranged in a single row array are formed in the ink conductive layer located in the connection terminal area.
Specifically, a planar ink conductive layer can be formed on the transparent conductive layer, a photoresist layer is formed, a photolithographic mask plate is used for exposure, the ink conductive layer is cleaned after development, and the ink conductive layer with a preset pattern is left, wherein the pattern comprises a plurality of connection terminal patterns arranged in a single row array.
In order to ensure that the connection terminal area and the flexible circuit board can be aligned and pressed when being pressed, alignment marks can be formed simultaneously when the ink conductive layer forms the connection terminal, and the alignment marks are located at two ends of the connection terminal area. Fig. 13 is a flowchart of another method for manufacturing a touch panel according to an embodiment of the invention, referring to fig. 13, in which step S140, at least one first connection terminal is electrically connected to at least one functional connection trace; electrically connect at least one second connecting terminal and at least one unsettled connection line, include:
s141, coating anisotropic conductive adhesive at the first connecting terminal and the second connecting terminal respectively;
and S142, aligning and laminating the functional connection wiring and the first connection terminal according to the position of the alignment mark, and aligning and laminating the suspended connection wiring and the second connection terminal.
The anisotropic conductive adhesive has the characteristics of transverse insulation and longitudinal conduction, when the functional connection wiring and the first connection terminal are aligned and pressed and the suspended connection wiring and the second connection terminal are aligned and pressed, alignment electrical connection can be realized while effective bonding is guaranteed by using the anisotropic conductive adhesive, and insulation is realized between each first connection terminal and each second connection terminal and between each functional connection wiring and each suspended connection wiring.
Fig. 14 is a flowchart of a method for manufacturing a touch panel according to another embodiment of the present invention, and referring to fig. 14, in detail, S120, a conductive layer is manufactured on one side of a substrate, the conductive layer includes a display area and a peripheral area surrounding the display area, the peripheral area includes a routing area and at least one connection terminal area; the wiring area is provided with a plurality of signal wirings extending to the display area; the connection terminal area is provided with at least one first connection terminal and at least one second connection terminal; wherein, first connecting terminal walks the line one-to-one electricity with the signal and is connected, and second connecting terminal walks the line with the signal and insulates, includes:
s121, carrying out laser cutting on the ink conducting layer and the transparent conducting layer in the wiring area to obtain a plurality of signal wirings;
s122, performing laser cutting on the ink conducting layer and the transparent conducting layer in the connecting terminal area to obtain at least one first connecting terminal and at least one second connecting terminal;
it should be noted that, in the process of preparing the ink conductive layer by using the screen printing plate, the ink conductive layer has formed patterns of the first connection terminal and the second connection terminal, at this time, laser cutting can be performed along a gap between the first connection terminal and the second connection terminal in the ink conductive layer in the process of performing laser cutting, so that when the ink conductive layer and the transparent conductive layer without the patterns are directly cut to form the first connection terminal and the second connection terminal, the first connection terminal and the second connection terminal are easily arranged unevenly, errors are generated in the distance between the first connection terminal and the second connection terminal, and further, when the flexible circuit board is pressed, the connection traces on the flexible circuit board and the connection terminals cannot be pressed in an aligned manner one by one.
Optionally, the first connection terminal and the second connection terminal in the ink conductive layer formed by the screen printing process in this step are obtained by printing in a preset pattern of the screen printing plate, and in order to more efficiently utilize the screen printing plate for screen printing, the screen printing plate in which the number of the connection terminals in the preset pattern is greater than that of the first connection terminal and the second connection terminal can be designed and adopted, that is, the connection terminals printed by the preset pattern are ensured to have reserved connection terminals. Therefore, the screen printing plate can be uniformly adopted, and the design and the manufacture of the screen printing plate are reduced, so that the utilization rate of the screen printing plate is improved, and the cost is reduced.
S123, carrying out laser cutting on the plurality of second connecting terminals along a direction forming a preset included angle with the extending direction of the second connecting terminals so as to insulate the second connecting terminals from the signal routing; wherein the preset included angle is alpha, and the alpha is more than 0 degree and less than or equal to 90 degrees.
Fig. 15 is a schematic view of a laser cutting line on a second connection terminal according to an embodiment of the present invention, referring to fig. 15, wherein when the second connection terminal is insulated from a signal trace by laser cutting, a direction 400 of the laser cutting should intersect with an extending direction 300 of the second connection terminal, that is, a certain preset included angle α is formed, and further, the second connection terminal 222 can be directly eliminated by laser along the extending direction 300 of the second connection terminal 222, so that the preset included angle is in a range of 0 ° < α ≦ 90 °.
The embodiment of the invention further provides a touch display device, which comprises any one of the touch panels provided by the embodiments of the invention, and exemplarily, the touch display device can be a mobile phone, a flat panel, a television and the like.
According to the touch display device provided by the embodiment of the invention, the suspended connection routing corresponding to the flexible circuit board is adopted, the at least one second connecting terminal insulated from the signal routing is arranged at the connecting terminal area in the touch panel, and the second connecting terminal is connected with the suspended connection routing, so that the flexible circuit board can adopt a unified full-channel flexible circuit board, and meanwhile, the suspended connection routing of the flexible circuit board is not electrically connected with the signal routing, and the problems that different flexible circuit boards are required to be designed and purchased corresponding adapter plates and hot-pressing tool bits are required to be adopted to perform pressing corresponding to integrated chips with different numbers and positions of suspended pins are solved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (14)
1. A touch panel, comprising:
the display panel comprises a substrate base plate and a conducting layer positioned on one side of the substrate base plate, wherein the conducting layer comprises a display area and a peripheral area surrounding the display area, and the peripheral area comprises a wiring area and at least one connecting terminal area; the wiring area is provided with a plurality of signal wirings extending to the display area; the connecting terminal area is provided with at least one first connecting terminal and at least one second connecting terminal; the first connecting terminals are electrically connected with the signal wires one by one, and the second connecting terminals are insulated from the signal wires;
the flexible circuit board comprises at least one functional connection line and at least one suspension connection line, the at least one functional connection line is electrically connected with the at least one first connection terminal, and the at least one suspension connection line is electrically connected with the at least one second connection terminal.
2. The touch panel according to claim 1, wherein a dividing line is disposed at least at an end of the second connection terminal close to the signal trace, the dividing line insulating the second connection terminal from the signal trace.
3. The touch panel according to claim 1, wherein the first connection terminals and the second connection terminals are arranged in a single row array.
4. The touch panel according to claim 1, wherein the peripheral region of the conductive layer includes a transparent conductive layer and an ink conductive layer, and the ink conductive layer is located on a side of the transparent conductive layer away from the base substrate.
5. The touch panel of claim 4, wherein the connection terminal area further comprises at least one third connection terminal.
6. The touch panel according to claim 4, wherein the ink conductive layer further comprises alignment marks, and the alignment marks are located at two ends of the connection terminal area.
7. The touch panel of claim 1, wherein the signal traces comprise touch signal traces.
8. A method for manufacturing a touch panel includes:
providing a substrate base plate;
preparing a conductive layer on one side of the substrate base plate, wherein the conductive layer comprises a display area and a peripheral area surrounding the display area, and the peripheral area comprises a wiring area and at least one connecting terminal area; the wiring area is provided with a plurality of signal wires extending to the display area; the connecting terminal area is provided with at least one first connecting terminal and at least one second connecting terminal; the first connecting terminals are electrically connected with the signal wires one by one, and the second connecting terminals are insulated from the signal wires;
providing a flexible circuit board, wherein the flexible circuit board comprises at least one functional connecting wire and at least one suspension connecting wire;
electrically connecting the at least one first connection terminal with the at least one functional connection trace; and electrically connecting the at least one second connecting terminal with the at least one suspended connecting trace.
9. The method according to claim 8, wherein the preparing of the conductive layer on the substrate side comprises:
preparing a transparent conductive layer on one side of the substrate base plate;
and preparing an ink conducting layer on one side of the transparent conducting layer, which is far away from the substrate.
10. The method according to claim 9, wherein a conductive layer is formed on the substrate side, the conductive layer includes a display region and a peripheral region surrounding the display region, the peripheral region includes a wiring region and at least one connection terminal region; the wiring area is provided with a plurality of signal wires extending to the display area; the connecting terminal area is provided with at least one first connecting terminal and at least one second connecting terminal; wherein, first connecting terminal with signal is walked the line electricity one-to-one, second connecting terminal with signal is walked the line insulation, includes:
performing laser cutting on the ink conducting layer and the transparent conducting layer in the wiring area to obtain a plurality of signal wirings;
performing laser cutting on the ink conducting layer and the transparent conducting layer in the connecting terminal area to obtain at least one first connecting terminal and at least one second connecting terminal;
performing laser cutting on the at least one second connecting terminal along a direction forming a preset included angle with the extending direction of the second connecting terminal so as to insulate the second connecting terminal from the signal routing; wherein the preset included angle is alpha, and the alpha is more than 0 degree and less than or equal to 90 degrees.
11. The method according to claim 9, wherein the preparing the ink conductive layer on the side of the transparent conductive layer facing away from the substrate base plate comprises:
printing an ink conducting layer on one side, away from the substrate base plate, of the transparent conducting layer through screen printing, wherein the ink conducting layer located on the connecting terminal area comprises a plurality of connecting terminals arranged in a single-row array.
12. The method for preparing the transparent conductive layer according to claim 9, wherein the preparing the ink conductive layer on the side of the transparent conductive layer, which faces away from the substrate base plate, comprises:
and forming an ink conducting layer on one side of the transparent conducting layer, which is far away from the substrate base plate, through a photoetching process, wherein the ink conducting layer positioned at the connecting terminal area comprises a plurality of connecting terminals which are arranged in a single row array.
13. The manufacturing method according to any one of claims 11 or 12, wherein the ink conductive layer further includes alignment marks at both ends of the connection terminal area;
said electrically connecting said at least one first connection terminal with said at least one functional connection trace; electrically connecting the at least one second connection terminal with the at least one flying connection trace, comprising:
coating anisotropic conductive paste at the first connection terminal and the second connection terminal, respectively;
and aligning and laminating the functional connecting wire and the first connecting terminal according to the position of the alignment mark, and aligning and laminating the suspended connecting wire and the second connecting terminal.
14. A touch display device comprising the touch panel according to any one of claims 1 to 7.
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| CN201811033825.8A CN109032424B (en) | 2018-09-05 | 2018-09-05 | Touch panel, preparation method and touch display device |
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| CN114677987B (en) * | 2022-04-26 | 2023-07-07 | 北京京东方光电科技有限公司 | Display panel and display device |
| CN115032836B (en) * | 2022-06-09 | 2023-10-17 | 京东方科技集团股份有限公司 | Display substrate and display device |
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| CN109032424A (en) | 2018-12-18 |
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