CN105955560A - process for manufacturing touch screen based on display panel - Google Patents
process for manufacturing touch screen based on display panel Download PDFInfo
- Publication number
- CN105955560A CN105955560A CN201610382996.6A CN201610382996A CN105955560A CN 105955560 A CN105955560 A CN 105955560A CN 201610382996 A CN201610382996 A CN 201610382996A CN 105955560 A CN105955560 A CN 105955560A
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- Prior art keywords
- touch screen
- element circuit
- image element
- manufacturing
- touch
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
-
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses a process for manufacturing a touch screen based on a display panel. The process comprises the following steps of: laminating a flexible circuit board on the display panel by directly taking the display panel provided with a pixel circuit as a manufacturing base material of the touch screen; connecting the pixel circuit and a touch chip via the flexible circuit board, and driving the pixel circuit by using the touch chip. When in contact with a protective cover plate, a conductor interferes with an electric field on an induction circuit, the touch chip measures an interference signal by scanning the pixel circuit and restores a touch position through calculation. According to the display panel based touch screen manufacturing process, on one hand, the problem of low precision of an etching process of a sensing circuit in an existing capacitive touch screen is solved and the manufacturing efficiency of the touch screen is improved; on the other hand, semi-finished products or defective products of existing displays are reutilized, thus the manufacturing cost of the touch screen is greatly reduced, and the manufacturing process has good market prospects.
Description
Technical field
The present invention relates to touch screen technology field, especially relate to a kind of technique making touch screen based on display floater.
Background technology
Touch screen, available finger touch operation carries out human computer conversation, is commonly used in touch-screen mobile phone, touch screen PDA, panel computer, automatic navigator and other industrial control equipments.Equipment can directly be operated by user by touch screen, eliminates operation button, enhances man-machine interactive.
Along with the development of science and technology, occurring in that capacitive touch screen, this kind of touch screen has become as the touch apparatus that the electronic equipment such as mobile phone, notebook is new.Owing to capacitive touch screen is compared with traditional touch screen, having multipoint-touch-technology, its location is more precisely reliable.
Present touch screen manufacturing technology is applying conductive material on base material; again by the technique of etching, go out to meet the figure of touch screen by material etches, cover sheet of fitting; connected by flexible PCB (FPC) and driving chip, drive these graphics circuitry etched with driving chip.When user's finger or other conductors tap cover sheet, in SENSOR (sensor) circuit will being connected in parallel with a capacitor on base material, so that the total capacitance that SENSOR is in this scan line changes.Driving chip will calculate the coordinate position of touch point according to the capacitance variations before and after scanning, and display is on screen.
But, the etch process precision of existing touch screen is the highest, is required for the display screen die sinking of each size, and production efficiency is low, and production cost is relative the highest.
Additionally, when the display floater of new varieties is when going into operation, generally yield can be the lowest, and if the display touch-control integrated panel of in-cell technology is at the initial stage of operation, yield only has 40%, generally during processing procedure, substantial amounts of defective products will occur, these semi-finished product, or defective products can only scrap process, cause the wasting of resources, also substantially increase the production cost of display floater simultaneously.
Accordingly, it would be desirable to study a kind of new technology for manufacturing touch screen, so that the defective products or the semi-finished product that occur during display floater processing procedure are fully utilized.
Summary of the invention
It is an object of the invention to overcome the defect of prior art, it is provided that a kind of technology for manufacturing touch screen based on display floater, utilize the display floater having completed image element circuit layout to process touch screen, to reduce touch screen production cost, and improve its production efficiency.
For achieving the above object, the present invention proposes following technical scheme: a kind of technology for manufacturing touch screen based on display floater, comprises the following steps:
S1, flexible PCB in hot pressing on the display floater be disposed with image element circuit；
S2, connects described image element circuit and touch chip by described flexible PCB, uses described touch chip to drive described image element circuit.
Preferably, arrange that the image element circuit process on described display floater includes: applying conductive material layer in substrate glass, described conductive material layer etches some gate lines and source electrode line, forms described image element circuit.
Preferably, the mode of employing sputter or printing is at applying conductive material layer in substrate glass, and the mode using illumination to etch etches described image element circuit on described conductive material layer.
Preferably, in described S2, the process forming image element circuit includes:
Many adjacent gate lines at base material frame or source electrode line are drawn golden finger position by S21, use flexible PCB to press together so that many gate lines or source electrode line parallel connection form the sensitive scanning passage of touch screen；
S22, presses together adjacent multiple described sensitive scanning passage, forms the sensor circuit of touch screen.
Preferably; described technique also includes: S3; cover upper cover sheet on said display panel; when there being conductor to contact on described cover sheet; electric field on sensor circuit can be formed interference; described touch chip, by scanning element circuit measuring to described interference signal, by calculating, restores touch location.
Preferably, the position of the golden finger of described flexible PCB pressing gate line or source electrode line is the position of former display driver chip on display floater.
Preferably, image element circuit described in described touch chip low-voltage driving.
The present invention is directed to the technological requirement height that existing in-cell touch screen exists, yield is low, high in cost of production problem, and sensing circuit etch process precision that existing capacitive touch screen exists is the highest, production efficiency is low, and production cost the highest relative problem, the semi-finished product or the defective products (referring to be disposed with above the panel of image element circuit) that directly use display are base material, simultaneously by the source electrode line of flexible PCB pressing image element circuit and gate line and connect image element circuit and touch chip, complete the making of touch screen.
The invention has the beneficial effects as follows:
On the one hand 1, the most directly use display floater as the base material of touch screen, it is not necessary to etch sensing circuit on original base material, thus overcome the problem that sensing circuit etch process precision that existing capacitive touch screen exists is the highest, the production efficiency of raising touch screen.
2, on the other hand by semi-finished product or the defective products recycling of existing display, thus greatly reduce the cost of manufacture of touch screen, there is preferable market prospect.
3, by the packaged type of flexible PCB pressing, simplify the processing technology of touch screen, decrease the cabling on display floater and the number of plies, reduce the size and sophistication of touch screen.
Accompanying drawing explanation
Fig. 1 a and Fig. 1 b is the schematic flow sheet of the embodiment of present invention technology for manufacturing touch screen based on display floater；
Fig. 2 is the structural representation of inventive touch screen；
Fig. 3 is the partial enlargement structural representation of Fig. 2.
Reference:
1, display floater, 2, image element circuit, 21, gate line, 22, source electrode line, 23, pixel electrode, 3, touch chip.
Detailed description of the invention
Below in conjunction with the accompanying drawing of the present invention, the technical scheme of the embodiment of the present invention is carried out clear, complete description.
Disclosed a kind of based on display floater technology for manufacturing touch screen, directly utilize the display floater (i.e. having been completed that the sensor circuit of a touch screen is arranged) having been laid out image element circuit above as the making base material of touch screen, thus decrease the manufacturing process of touch screen, improve its work efficiency, be greatly reduced the cost of manufacture of touch screen simultaneously.
Below as a example by the semi-finished product or defective products (it should be noted that having been laid out image element circuit on these semi-finished product or defective products) of display, technical scheme is described.
Shown in Fig. 1 a and Fig. 1 b, Fig. 2 and Fig. 3, disclosed a kind of based on display floater technology for manufacturing touch screen, comprise the following steps:
S1, flexible PCB in hot pressing on the display floater 1 be disposed with image element circuit 2.
Specifically, on display floater 1, the process of laying out pixel circuits 2 includes: in the manufacturing process of display, first substrate glass can carry out sputter or printing conductive material, form conductive material layer with coating in substrate glass；Secondly, again this conductive material layer is carried out illumination etching, to etch some gate lines (gate line) and source electrode line (source line) on conductive material layer, when, after the line arrangement completing gate and source, in fact having been completed the circuit arrangement of a touch screen.
It should be noted that the present invention be directly using above-mentioned display floater as the making base material of touch screen, so the process of above-mentioned laying out pixel circuits is not to be covered in the inventive solutions.
Image element circuit 2 is in addition to including above-mentioned gate line 21 and source electrode line 22, typically also include that the pixel electrode 23 being formed in the pixel region that gate line 21 limits with source electrode line 22 and the thin film transistor (TFT) being connected with pixel electrode 23 (are called for short TFT, not shown), one thin film transistor (TFT) is controlled by a source electrode line 22 and a gate line 21, the pixel electrode 23 being connected with this thin film transistor (TFT) by being turned on and off thin film transistor (TFT) to drive.
The image element circuit of display floater 1 is connected with touch chip 3, and this touch chip 3 is connected with source electrode line 22 and the gate line 21 of image element circuit 2, is used for driving image element circuit 2 to work.Shown in Fig. 3, in the horizontal direction, the touch chip 3 that gate line 21 is corresponding is connected；In the vertical direction, the corresponding touch chip of source electrode line 22 3 is connected.
It should be noted that the thin film transistor (TFT) of 2 can exist in present invention pixel circuit, it is also possible to need not.If there is thin film transistor (TFT), then due to the existence of thin film transistor (TFT) in image element circuit 2, the touch chip 3 of the present invention is accomplished by carrying out low-voltage driving, the voltage of touch chip to be less than, prevents thin film transistor (TFT) to be all opened.If touch chip voltage here is sufficiently high, the thin film transistor (TFT) in the image element circuit 2 often gone is opened, will result in the capacitor charge and discharge of image element circuit 2, can make touch chip 3, when measuring capacitance signal, deviation occur.
S2, connects image element circuit 2 and touch chip 3 by flexible PCB, uses touch chip 3 to drive image element circuit 2.
Specifically, the gate line 21 of horizontal direction is divided into many groups by the program, often group is made up of some adjacent gate lines 21, in like manner, source electrode line 22 on vertical direction is divided into many groups, often group is made up of some adjacent source electrode lines 22, often group gate line 21 and source electrode line 22 are drawn by corresponding golden finger (not shown), the golden finger often organizing gate line 21 and source electrode line 22 uses flexible PCB in heat pressing process hot pressing, thus form the sensitive scanning passage of multiple touch screen, the position of flexible PCB pressing here is the position at former driving chip place on display floater 1.
As required, more adjacent multiple sensitive scanning passages can be grouped, after packet, the multiple sensitive scanning passages often organized be pressed together, form the sensor circuit of touch screen.
Flexible PCB is connected with touch chip 3, i.e. flexible PCB one terminates image element circuit 2, and the other end connects touch chip 3.This packaged type of image element circuit 2 and touch chip 3, has technical maturity, cheap and save the advantages such as space.
Finally, in order to display floater is protected, may also include step S3 when the present invention implements: cover upper cover sheet (not shown) on a display panel.
The operation principle of inventive touch screen is: when having on conductor contact protection cover plate, the electric field on image element circuit can be formed interference, and touch chip measures this interference signal, by calculating, restores touch location.
In sum, the present invention directly uses the source line and gate line of display floater as the sensing passage constituting touch screen, and pass through flexible PCB, many line combinations are forced together, as a sensing passage, thus complete the making of touch screen, greatly reduce production cost and the work efficiency of touch screen, there is wide market prospect.
The technology contents of the present invention and technical characteristic have revealed that as above; but those of ordinary skill in the art are still potentially based on teachings of the present invention and announcement and make all replacements without departing substantially from spirit of the present invention and modification; therefore; scope should be not limited to the content disclosed in embodiment; and the various replacement without departing substantially from the present invention and modification should be included, and contained by present patent application claim.
Claims (7)
1. a technology for manufacturing touch screen based on display floater, it is characterised in that comprise the following steps:
S1, flexible PCB in hot pressing on the display floater be disposed with image element circuit；
S2, connects described image element circuit and touch chip by described flexible PCB, uses described touching
Image element circuit described in control chip drives.
Technology for manufacturing touch screen the most according to claim 1, it is characterised in that arrange described display
Image element circuit process on panel includes: applying conductive material layer in substrate glass, in described conduction
Etch some gate lines and source electrode line on material layer, form described image element circuit.
Technology for manufacturing touch screen the most according to claim 2, it is characterised in that use sputter or print
The mode of brush is at applying conductive material layer in substrate glass, and uses mode that illumination etches in institute
State and on conductive material layer, etch described image element circuit.
Technology for manufacturing touch screen the most according to claim 2, it is characterised in that described S2 includes:
Many adjacent gate lines at base material frame or source electrode line are drawn golden finger position, are adopted by S21
Press together with flexible PCB so that many gate lines or source electrode line parallel connection form the sense of touch screen
Answer scan channel；
S22, presses together adjacent multiple described sensitive scanning passage, forms the sensing of touch screen
Circuit.
Technology for manufacturing touch screen the most according to claim 1, it is characterised in that described technique is also wrapped
Include: S3, cover upper cover sheet on said display panel, contact described cover sheet when there being conductor
Time upper, the electric field on sensor circuit can be formed interference, described touch chip passes through scanning element circuit
Measure described interference signal, by calculating, restore touch location.
Technology for manufacturing touch screen the most according to claim 4, it is characterised in that described flexible circuit
The position of the golden finger of plate pressing gate line or source electrode line is the position of former display driver chip on display floater
Put.
Technology for manufacturing touch screen the most according to claim 1, it is characterised in that described touch chip
Image element circuit described in low-voltage driving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610382996.6A CN105955560B (en) | 2016-06-02 | 2016-06-02 | A kind of technology for manufacturing touch screen based on display panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610382996.6A CN105955560B (en) | 2016-06-02 | 2016-06-02 | A kind of technology for manufacturing touch screen based on display panel |
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| Publication Number | Publication Date |
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| CN105955560A true CN105955560A (en) | 2016-09-21 |
| CN105955560B CN105955560B (en) | 2019-06-18 |
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| CN201610382996.6A Active CN105955560B (en) | 2016-06-02 | 2016-06-02 | A kind of technology for manufacturing touch screen based on display panel |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103150073A (en) * | 2013-03-12 | 2013-06-12 | 合肥京东方光电科技有限公司 | Capacitive embedded touch screen and display device |
| CN103513452A (en) * | 2012-06-29 | 2014-01-15 | 北京京东方光电科技有限公司 | Method for assembling display device |
| CN205015865U (en) * | 2015-10-09 | 2016-02-03 | Tcl显示科技（惠州）有限公司 | Touch display apparatus and have this touch display apparatus's electronic equipment |
-
2016
- 2016-06-02 CN CN201610382996.6A patent/CN105955560B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513452A (en) * | 2012-06-29 | 2014-01-15 | 北京京东方光电科技有限公司 | Method for assembling display device |
| CN103150073A (en) * | 2013-03-12 | 2013-06-12 | 合肥京东方光电科技有限公司 | Capacitive embedded touch screen and display device |
| CN205015865U (en) * | 2015-10-09 | 2016-02-03 | Tcl显示科技（惠州）有限公司 | Touch display apparatus and have this touch display apparatus's electronic equipment |
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| Publication number | Publication date |
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| CN105955560B (en) | 2019-06-18 |
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