CN102375632A

CN102375632A - Touch panel laminated structure of display

Info

Publication number: CN102375632A
Application number: CN201010262436XA
Authority: CN
Inventors: 高吴栋; 许治平; 邱启峰
Original assignee: IGTEK CORP
Current assignee: IGTEK CORP
Priority date: 2010-08-25
Filing date: 2010-08-25
Publication date: 2012-03-14

Abstract

The invention relates to a touch panel laminated structure of a display, in particular to the touch panel laminated structure of the display, which has the advantages that the production cost and the electromagnetic interference can be reduced. A touch panel is arranged on a display board and is formed by adjacently stacking a transparent substrate, a transparent conducting layer and an electrode pattern layer up and down, wherein the electrode pattern layer is formed in a way that two parallel X-side electrodes and two parallel Y-side electrodes form a rectangle to be around the periphery of the surface of the transparent conducting layer; and the surface of the electrode pattern layer on one side of the transparent conducting layer is provided with a mother glass layer in a laminating way. Through the design, in the touch panel provided by the invention, a surface hardening layer has no need to be processed, so that the processing is simplified, the production yield is improved, and the manufacturing cost is reduced; and meanwhile, the interference of electromagnetism to the transparent conducting layer and the electrode pattern layer can be reduced, and the touch validity and the touch accuracy of the touch panel are improved.

Description

The laminated structure of the contact panel of display

Technical field

The invention belongs to the contact panel technical field that a kind of LCD is used, particularly be meant a kind of contact panel layered structure, thereby can reduce cost, and can reduce electromagnetic interference (EMI), to improve its economic benefit at surface capacitance type.

Background technology

Scientific and technological now flourish, the information product kind is weeded out the old and bring forth the new, and has satisfied popular different demands.Early stage display is that (because it is bulky big with power consumption, and the radiant rays that is produced has the problem of harm health to cathode-ray tube (CRT) for the user of long-time use display for Cathode Ray Tube, CRT) display mostly.Therefore, on the market display gradually will (Liquid Crystal Display LCD) replaces old CRT monitor by LCD now.That LCD has is compact, low radiation and advantages such as power consumption is low, also so become the existing market main flow.Moreover, be accompanied by in recent years because making a leapleap forward fast of system science and technology made in panel production, the production cost of contact panel is significantly reduced; Therefore contact panel has been widely used on the general electronic product at present gradually; On these electronic products, contact panel is configured on the display screens of electrical equipment and uses, so that let the user can carry out interactive input operation; And significantly improve the goodwill property of linking up the interface between people and the machine, and promote input operation efficient.

Distinguish contact panel from know-why, it can be divided into resistive technologies contact panel, capacitance technology contact panel, infrared technology contact panel, surface acoustic wave technique contact panel, electromagnetic technique contact panel and optical technology contact panel etc.The wherein accurate positioning of electric resistance touch-control panel, but its price is quite high, and be prone to damage because of scratch.Infrared technology contact panel cheap, but its housing is frangible, is easy to generate light and disturbs distortion under the curved surface situation; And surface acoustic wave touch panel has solved the various defectives of touch screen in the past, and is clear uprising, is suitable for various occasions, and shortcoming is that water droplet, the dust of panel surface can make the blunt of contact panel change, does not even work.

And in recent years, receive the intimate touch-control interface of smart mobile phone, let smart mobile phone have an opportunity to win more people's favor.And the appearance of multi-point touch function (like smart mobile phones such as iPhone, HTC); More cause the new revolution of using the interface; And significantly improve the goodwill property at people and machinery compartment communication interface, and promote input operation efficient, let the user can use the electronic product of this multi-point touch panel with the mode of intuition.

The formation of the touch controlled type LCD of known technology; See also Fig. 1, Fig. 2; It includes a display board 20 and a contact panel 10; Wherein contact panel 10 has a transparency carrier 11, and transparency carrier 11 tops are provided with a transparency conducting layer 12, and transparency conducting layer 12 tops are provided with an electrode pattern layer 13; This electrode pattern layer 13 is by forming periphery that the two relative X lateral electrodes 131 that surround into rectangle and two relative Y lateral electrodes 132 are formed at this transparency conducting layer 12 partly; Moreover surface, electrode pattern layer 13 top is covered with the hardened layer 14 that an insulation protection is used, and wherein transparency carrier 11 is selected from clear glass or clear plastic, and transparency conducting layer 12 optional autoxidation indium tin films (Indium Tin Oxide; ITO) or antimony tin film (Antimony doped Tin Oxide; ATO), again, in order to compensate the curve distribution of the electric field on this transparency conducting layer 12, hardened layer 14 then is selected from silicon dioxide (SiO ₂) etc.And this contact panel 10 directly is arranged at the top of display board 20; When the user touches contact panel 10 via finger or conductor; Can be by the position of finger or conductor touching contact panel 10; Formed non-uniform electric field and the position of learning correct finger or conductor touching contact panel 10, and then make the corresponding work of display board 20 demonstrations through circuit and working software.

Aforementioned condenser type touch pad technology is on operational architecture; System can produce 1 uniform electric field at the ITO layer; When the electric capacity charge effects can appear in the finger touch panel, form capacitive coupling between transparency electrode on the panel and finger, and then produce capacitance variations; Controller just can calculate contact position according to size of current as long as measure 4 corner strength of current.Though the surface capacitance type technology is produced easily, need carry out calibration operation, also must overcome the electromagnetic interference (EMI) and the noise problem that are difficult to resolve.Observe with regard to environmental factor, EMI is common design challenge, in the mobile phone of signal complicacy, seems more difficult again; It also is the factor that can not be ignored that weather changes, and equality of temperature, humidity or rainy situation all can not influence the touch-control sensing correctness.

And aforementioned capacitance type touch-control panel 10 structurally outermost layer be a very thin silicon dioxide hardened layer 14; Hardness reaches 7H; The second layer is a transparency conducting layer 12, and the function of undermost transparency carrier 11 is for electromagnetic wave shielding, can under good glitch-free environment, work to keep.Its hardened layer 14 needs could accomplish through semi-conductive film-plating process, and its uniformity coefficient requires high but in fact; So make difficult and the cost height, moreover it is easily because of thickness is not enough, and make the transparency conducting layer 12 of contact panel 10 and the influence that electrode pattern layer 13 receives temperature, humidity or the electromagnetism of external environment; And then have influence on the correctness of its sensing; Cause size of current output wrong, and produce the inaccurate problem of contact position of calculating, can't satisfy the demand of actual use.

Summary of the invention

Therefore; How a kind of laminated structure of contact panel of display is proposed to the problems referred to above; It can be provided with a contact panel in display board top, and this contact panel is formed by a transparency carrier, a transparency conducting layer and neighbouring the stacking of an electrode pattern layer, and wherein the electrode pattern layer side surface that differs from transparency conducting layer has stacked a plain glass; Not by scratch, and can reduce electromagnetic interference (EMI) and noise etc. with the protection contact panel.

Again, the present invention establishes so that contact panel can oppositely be put, to increase its application flexibility in addition at the laminated structure of the contact panel that a kind of display is provided.

In view of the above, the present invention mainly is through following technological means, and come concrete actual aforesaid purpose and effect: this LCD includes a contact panel and a display board;

This contact panel has a transparency carrier; And the below of transparency carrier has stacked a transparency conducting layer; And the below of transparency conducting layer stacks a rectangular electrode pattern layer that centers on; Moreover the electrode pattern layer surface below is provided with a plain glassy layer, and this contact panel is the top that stacks on display board with a side surface of the plain glassy layer of tool.

With this,, let contact panel of the present invention through the concrete realization of aforementioned techniques means of the present invention; Can not need pass through the processing of cementation zone, and directly use plain glass to protect, its decapacitation is simplified outside the processing procedure; More can improve and produce yield and reduce manufacturing cost, through the design of plain glass, more can reduce the interference of electromagnetism simultaneously transparency conducting layer and electrode pattern layer; Improve the certainty and the accuracy of its touch-control; And contact panel also can oppositely be provided with, and contact panel can plain glass one side be stacked on the display board, increases the dirigibility that it conforms and uses.

Description of drawings

Fig. 1 is the perspective exploded view of the concise and to the point framework of known touch-control liquid crystal display;

Fig. 2 is the concise and to the point side-looking diagrammatic cross-section of known touch-control liquid crystal display;

Fig. 3 is the perspective exploded view of the contact panel of LCD of the present invention;

Fig. 4 is the schematic top plan view of the contact panel of LCD of the present invention;

Fig. 5 A, Fig. 5 B are the side-looking diagrammatic cross-section of the contact panel of LCD of the present invention, and wherein Fig. 5 A is for decomposing shape, and Fig. 5 B is for coinciding shape;

Fig. 6 A, Fig. 6 B are the side-looking diagrammatic cross-section of another embodiment of contact panel of LCD of the present invention, and wherein Fig. 6 A is for decomposing shape, and Fig. 6 B is for coinciding shape; And

Fig. 7 for the contact panel of LCD of the present invention in receiving sensing signal to judge the synoptic diagram of multi-contact positions.

[main element symbol description]

10 contact panels, 11 transparency carriers

12 transparency conducting layers, 13 electrode pattern layer

131 X lateral electrodes, 132 Y lateral electrodes

14 hardened layers

50 contact panels, 51 transparency carriers

52 transparency conducting layers, 53 electrode pattern layer

531 X lateral electrodes, 532 Y lateral electrodes

533 leads, 534 connecting portions

55 plain glassy layer 60 display boards

Embodiment

For making those skilled in the art can further understand formation of the present invention, characteristic and other purposes, below be to lift preferred embodiment of the present invention, and conjunction with figs. specifies as after, let those skilled in the art can practical implementation simultaneously.

The present invention is the laminated structure of the contact panel of display; Enclose in the specific embodiment and member thereof of the illustrative contact panel of the present invention of figure; All about preceding and back, left and the right side, top and bottom, top and bottom and level and vertical reference; Only be used for conveniently describing, and unrestricted the present invention, also non-its member be limited to any position or direction in space.Specified size in graphic and the instructions, when can be in not leaving claim of the present invention, design according to a particular embodiment of the invention and demand and change.

The present invention is the laminated structure of a kind of contact panel of display, and is as shown in Figure 3, and the LCD of this touch controlled type includes a contact panel 50 and a display board 60; Wherein contact panel 50 is the touch technology of surface capacitance type, and this contact panel 50 stacks on the top of display board 60, on operational architecture; System can produce 1 uniform electric field at contact panel 50; When the electric capacity charge effects can appear in finger contact contact panel 50, form capacitive coupling between contact panel 50 and finger, and then produce capacitance variations; Controller is as long as measure 4 corner strength of current; Just can calculate contact position according to size of current, so when the user touches contact panel 50 via finger or conductor, can be by the position of finger or conductor touching contact panel 50; Formed non-uniform electric field and the position of learning correct finger or conductor touching contact panel 50; And then make display board 60 show corresponding work through circuit and working software, and the formation of aforementioned touch technology and display board 60 is not that characteristic of the present invention belongs to, and appearance repeats no more;

And about the detailed formation of preferred embodiment of the present invention; Then shown in Fig. 3, Fig. 4 and Fig. 5 A, Fig. 5 B; Wherein contact panel 50 has a transparency carrier 51; The top of this transparency carrier 51 has stacked a transparency conducting layer 52, and the top of transparency conducting layer 52 has stacked an electrode pattern layer 53, moreover surface, electrode pattern layer 53 top is provided with the plain glassy layer 55 of a tool specific thicknesses; Wherein transparency carrier 51 is selected from clear glass or clear plastic, and transparency conducting layer 52 optional autoxidation indium tin films (Indium Tin Oxide; ITO) or antimony tin film (Antimony doped Tin Oxide; And plain glass sheet of plain glassy layer 55 optional self-induced transparencys, transparent high-effect thin-layer chromatography cellulose glass sheet etc. ATO);

Again; Former electrodes patterned layer 53 is by forming periphery that the two relative X lateral electrodes 531 that surround into rectangle and two relative Y lateral electrodes 532 are formed at this transparency conducting layer 52 partly; And the X lateral electrode 531 of electrode pattern layer 53 is designed to respectively lay with equal difference or geometric ratio mode increasing or decreasing to homonymy with the impedance of Y lateral electrode 532; Make contact panel 50 produce the phenomenon of gradient in same level or vertical contact resistance; The electric current that prevents electrode pattern layer 53 outputs when move two contacts is cancelled each other, and utilizes the controller (not shown) to measure four corner strength of current, just can calculate Building X mark, the Building Y mark of trying to achieve two different contacts according to size of current.X, the Y lateral electrode the 531, the 532nd of electrode pattern layer 53 are formed on transparency conducting layer 52 peripheries of contact panel 50 with technology such as etching, screen painting, electric transfer printings in addition; Moreover the X of electrode pattern layer 53, Y lateral electrode 531,532 and be selected from conductive material, mix like carbon paste, elargol, copper glue or its etc.;

Moreover; Former electrodes patterned layer 53 can be four exit points (as shown in Figure 4) or eight exit points; The opposite endpoint of the X of this electrode pattern layer 53, Y lateral electrode 531,532 be provided with jointly respectively one be used to measure voltage, electric current lead 533, aforementioned wire 533 is selected from conductive material, mixes like carbon paste, elargol, copper glue or its etc.; The present invention is main embodiment with the elargol; And lead 533 also is laid in the nonclient area surface of contact panel 50 with the screen painting mode, again on the contact panel 50 and have one and supply lead 533 connecting portion 534 laid of side points in addition, for a controller (not shown) of the electric serial connection contact panel 50 of lead 533 difference;

With this, contact panel 50 can be utilized to produce protective effect by element glassy layer 55, and can reduce electromagnetic interference (EMI) and noise etc., and organize the laminated structure of contact panel that constitutes a low cost and disturb few display.

And about practice of the present invention; Then still please referring to shown in Figure 7; When real work; Each connects the X of the electrode pattern layer 53 of this contact panel 50, Y lateral electrode 531,532 relative four corners outer lead 533 and joins with one, exchanges sensing signal in order to receive one respectively, uses for the position that measures on the contact panel 50 two different contact PA, PB;

On operational architecture; System can be at the non-uniform electric field of the transparency conducting layer 52 of contact panel 50, when the electric capacity charge effects can appear in finger contact contact panel 50, make each X, the Y lateral electrode 531,532 of contact panel 50 top electrode patterned layer 53 and point between form capacitive coupling; And then generation capacitance variations; Controller measures four corner strength of current through aforementioned manner, and utilizes the X of its electrode pattern layer 53, the impedance of Y lateral electrode 531,532 to lay with equal difference or geometric ratio mode increasing or decreasing to homonymy, makes two phenomenons that produce gradient in same level or vertical contact resistance on the contact panel 50; Effectively prevent two different contact PA, when PB moves; The electric current of electrode pattern layer 53 outputs is cancelled each other, and so just can calculate the position of two different contact PA, PB according to size of current, so that controller is judged its follow-up convergent-divergent, rotation and dilatory action; To satisfy the multiconductor demand of surface capacitance type contact panel; And can significantly simplify the formation and the manufacture difficulty of multipoint mode contact panel, and then reduce its manufacturing cost, effectively significantly promote the surcharge and the economic benefit of surface capacitance type contact panel.

And owing to directly be covered with a plain glassy layer 55 on the transparency conducting layer 52 of contact panel 50 and the electrode pattern layer 53; Therefore can save the processing procedure of known hardened layer, and plain glassy layer 55 of the present invention is to adopt the technology pasted setting, known hardened layer then is the coating technique of partly leading in the processing procedure; On large-sized contact panel 50; Structure of the present invention can significantly be simplified its manufacture difficulty, and can improve the yield and the efficient of producing, and then reduces its production cost;

Again because contact panel 50 of the present invention is protected transparency conducting layers 52 and electrode pattern layer 53 with plain glassy layer 55; So can reduce temperature in the environment, humidity or electromagnetism etc. to the influence of transparency conducting layer 52 with electrode pattern layer 53; Further can reduce its electromagnetic interference (EMI) and noise; The certainty and the accuracy of its touch-control have been improved; Make the LCD of this contact panel 50 of utilization can be applicable to significantly increase the scope of work of multi-point touch panel in the relatively poor workplace of environmental baseline, improve its economic benefit.

Moreover; The present invention has an embodiment in addition, and it is shown in Fig. 6 A, Fig. 6 B, and the LCD of this touch controlled type includes a contact panel 50A and a display board 60; Contact panel 50A has a transparency carrier 51A again; The below of this transparency carrier 51A has stacked a transparency conducting layer 52A, and the below of transparency conducting layer 52A has stacked an electrode pattern layer 53A, moreover electrode pattern layer 53A surface below is provided with the plain glassy layer 55A of a tool specific thicknesses; And this contact panel 50A stacks on the top of display board 60 with plain glassy layer 55A surface one side, and forms the LCD of a tool surface capacitance type contact panel 50A.Because this contact panel 50A bottom is with plain glassy layer 55A protection transparency conducting layer 52A and electrode pattern layer 53A; Receive the phenomenon that display board 60 disturbs and can reduce contact panel 50A; Its decapacitation is possessed outside aforesaid advantage and the practical value; Further let contact panel 50A also can oppositely be arranged on the display board 60, increase the dirigibility that it conforms and uses.

With this, be appreciated that the present invention is the splendid creation of an intention, except the problem that effective solution known technology is faced, more significantly promotes effect.

Claims

1. the laminated structure of the contact panel of a display is characterized in that, this LCD includes a contact panel and a display board;

This contact panel is arranged at the display board top; And contact panel has a transparency carrier; The top of this transparency carrier has stacked a transparency conducting layer; And the top of transparency conducting layer stacks a rectangular electrode pattern layer that centers on, moreover the surface is provided with a plain glassy layer above the electrode pattern layer, and contact panel stacks on the top of display board with transparency carrier one side surface.

2. the laminated structure of the contact panel of a display is characterized in that, this LCD includes a contact panel and a display board;

This contact panel has a transparency carrier; And the below of transparency carrier has stacked a transparency conducting layer; And the below of transparency conducting layer stacks a rectangular electrode pattern layer that centers on; Moreover the electrode pattern layer surface below is provided with a plain glassy layer, and this contact panel system stacks on the top of display board with a side surface of the plain glassy layer of tool.

3. according to claim 1 or claim 2 the laminated structure of contact panel of display; It is characterized in that; This electrode pattern layer is arranged with a relative X lateral electrode in the upper and lower edge of transparency conducting layer; Electrode pattern layer is arranged with a relative Y lateral electrode in the left and right edge of contact panel again, and the impedance of X, Y lateral electrode is laid with equal difference or geometric ratio mode increasing or decreasing to homonymy.

4. according to claim 1 or claim 2 the laminated structure of contact panel of display is characterized in that, this electrode pattern layer is that the technology with screen painting is formed on the contact panel.

5. according to claim 1 or claim 2 the laminated structure of contact panel of display is characterized in that this electrode pattern layer is selected from carbon paste, elargol or its mixing of electric conductivity.

6. according to claim 1 or claim 2 the laminated structure of contact panel of display is characterized in that the lead of this electrode pattern layer is selected from the elargol of electric conductivity.

7. according to claim 1 or claim 2 the laminated structure of contact panel of display is characterized in that this element glassy layer is selected from transparent plain glass sheet or transparent thin-layer chromatography cellulose glass sheet.

8. the laminated structure of the contact panel of a display; It is characterized in that; This contact panel has a transparency carrier; And the top of transparency carrier has stacked a transparency conducting layer, and the top of transparency conducting layer stacks a rectangular electrode pattern layer that centers on, moreover surface, electrode pattern layer top is provided with a plain glassy layer; Make contact panel stack on the top of a display board.

9. the laminated structure of the contact panel of display as claimed in claim 8; It is characterized in that; This electrode pattern layer is formed at the edge of this transparency conducting layer by two relative X lateral electrodes that surround into rectangle and two relative Y lateral electrodes, and the impedance of X lateral electrode and Y lateral electrode is laid with equal difference or geometric ratio mode increasing or decreasing to homonymy respectively.

10. the laminated structure of the contact panel of display as claimed in claim 8 is characterized in that, this element glassy layer is selected from transparent plain glass sheet or transparent thin-layer chromatography cellulose glass sheet.