CN209044571U - The more press-key structures of capacitance touch screen - Google Patents

Abstract

The more press-key structures of capacitance touch screen, it is characterised in that at least five touch key-press is provided on ito film conductive layer, the touch key-press is connect with the conducting wire being printed on the ito film conductive layer respectively；The edge that the conductor spacing of all keys converges at the ito film conductive layer can be connect with FPC wiring board；The key on ito film conductive layer and the region other than conducting wire are non-conducting areas.The touch screen of the utility model, ratio it is existing there are four one times of key more than keystroke touch screen, can realize more functions according to different keys, make the more convenient convenience of operation.

Description

The more press-key structures of capacitance touch screen

Technical field

The utility model relates to capacitance touch screens, electric resistance touch screen, refer in particular to heatable touch screen.

Background technique

For touch screen as a kind of sensor, that applies in all trades and professions such as life, manufacturing industry is more and more extensive.Exist at present The touch screen used in the market is roughly divided into two major classes, resistive touch screen and capacitive touch screen.

Resistive touch screen is substantially the structure that film adds glass, is coated in film and the adjacent one side of glass ITO (nano indium tin metal oxide) coating, ITO have good electric conductivity and the transparency.When touch operation, film lower layer ITO can touch the ITO of glass superstrate, spread out of corresponding electric signal via inductor, be sent to processor by conversion circuit, It is converted into X on screen, Y value by operation, and completes the movement clicked, and presents on the screen.The work of electric resistance touch screen Principle is mainly the operation and control realized by pressure sensitive principle to screen content, and this screen body of touch screen part is One piece of multi-layer compound film cooperated with display surface very resistive touch screen, wherein first layer is glass or organic glass Bottom, the second layer are interlayer, and third layer is polynary resin surface layer, and surface is also coated with the conductive layer of layer of transparent, is stamped again above One layer of outer surface be hardened, smooth scratch resistant plastic layer.In the conducting shell and glassy layer inductor of polynary rouge skin surface It is to be separated electric current by many small interlayers by surface layer, when touching surface layer pressure, touches bottom, controller is simultaneously from four A angle reads the electric current to match and calculates the distance of finger position.This touch screen forms touching using the conductive layer of two layers of high transparency Screen is touched, distance is only 2.5 microns between two layers.When a finger is touching the screen, the two conductive layers of usual mutually insulated are just being touched It touches point and has been equipped with a contact, because wherein a face conductive layer connects the 5V even voltage field of Y direction, so that the electricity of detecting layer Pressure becomes non-zero after controller detects this connection from zero and carries out A/D conversion, and by obtained voltage value compared with 5V, i.e., The Y axis coordinate of touch point can be obtained, similarly obtains the coordinate of X-axis, here it is the common most basic originals of all resistive technologies touch screens Reason.

Capacitance-type touch screen technology is worked using the electric current induction of human body.Capacitive touch screen is one piece four layers Compound glass screen, the inner surface and interlayer of glass screen are respectively coated with one layer of ITO, and outermost layer is a thin layer silica protective layer for glass, folder Layer ITO coating is used as working face, and four electrodes are drawn on four angles, and internal layer ITO is shielded layer to guarantee good working environment. When finger touches on the metal layer, due to human body electric field, user and touch screen surface are formed with a coupled capacitor, for height For frequency electric current, capacitor is direct conductor, and then finger siphons away the electric current of a very little from contact point.This electric current is respectively from touching It touches and is flowed out in the electrode on the quadrangle of screen, and the electric current for flowing through this four electrodes is directly proportional at a distance from finger to quadrangle, control Device processed obtains the position of touch point by accurately calculating to this four current ratios.Capacitance plate will realize multi-point touch, lean on Exactly increase the electrode of mutual capacitance, is exactly that one group of mutual capacitance module is arranged in screen block in each region briefly All be work independently, so capacitance plate can independent detection to the touch-control situation in each region, after being handled, simply implement Multi-point touch.

The control button of capacitance touch screen can only generally accomplish four keys at present, since a touch key-press can only realize one Kind function, therefore, the capacitance touch screen of existing four keys cannot achieve more functions, especially as the behaviour of touch type For controlling panel, use is very inconvenient.

Summary of the invention

The technical problem to be solved by the utility model is to provide a kind of more press-key structures of capacitance touch screen, by multiple Different touch screen functions may be implemented in key.

In order to solve the above technical problems, technical solution provided by the utility model is the more press-key structures of capacitance touch screen, Be characterized in that being provided at least five touch key-press on ito film conductive layer, the touch key-press respectively be printed on the ITO Conducting wire connection on film conductive layer；The edge that the conductor spacing of all keys converges at the ito film conductive layer can be with FPC Wiring board connection；The key on ito film conductive layer and the region other than conducting wire are non-conducting areas.

The centre of the ito film conductive layer is provided with key, is provided in the periphery of the key with notch Annular key, the circumferentially-spaced of the annular key is provided with several keys.

It is respectively arranged with a key in the two sides of the notch of the annular key, it is opposite in the notch of the annular key Side side is arranged at intervals with six press keys.

For each touch key-press after touch key-press, function or corresponding functional parameter can be displayed in display area, Keep control panel manipulation more convenient.The touch screen of the utility model, ratio it is existing there are four one times of key more than keystroke touch screen, More functions can be realized according to different keys, make the more convenient convenience of operation.

Detailed description of the invention

Fig. 1, more keystroke touch screen structural schematic diagrams.

Fig. 2 uses the control panel structural schematic diagram of more keystroke touch screens.

Specific embodiment

Scheme in view of the above technology is now lifted preferred embodiment and is specifically described in conjunction with diagram.Referring to Fig. 1, touch screen More press-key structures are as follows.

Generally structure is glass cover-plate, glue-line and ito film conductive layer to capacitance touch screen from top to bottom, this three-decker passes through Pressing forms capacitance touch screen.The conductive layer of ito film conductive layer 1 is conductive indium-tin oxide layer.Pass through acid on ito film conductive layer Alkaline etching removes extra conductive materials, forms more press-key structures.More press-key structures of ito film conductive layer are in ito film Center portion position is provided with an independent key 2, and the periphery of independent key 2 is provided with out circular ring shape key 3 jaggy, circular ring shape Key can be touched in sliding.Multiple keys are respectively provided in three sides of circular ring shape key, multiple keys are greater than 3, In the present embodiment, six press keys (4,5,6,7,8,9) are arranged at intervals in the top of circular ring shape key and top two sides, in annulus The lower section two sides of shape key are arranged at intervals with two keys (10,11).The notch of circular ring shape key opens up in its lower section, i.e. annulus The notch of shape key is located between key (10,11).It is printed with the edge that conducting wire extends to touch screen, position on each key Touch platen edge is extended to after the conducting wire of the key 2 of circular ring shape key center passes through the notch of circular ring shape key.Circular ring shape is pressed The notch both ends of key are connected separately with a conducting wire.The connecting wires 12 of all keys finally converge at key (10,11) it Between touch platen edge.Positioned at touch platen edge each connecting wire connect with FPC wiring board 15, by FPC wiring board with set Standby mainboard control chip connection.The function of each key is controlled by mainboard setting.Referring to Fig. 2, more keystroke touch screens are used Device panel, which is divided into display area 13, and lower part is divided into more keystroke touch screen regions 14.Each touch key-press exists After touch key-press, function or corresponding functional parameter can be displayed in display area, keep control panel manipulation more convenient.

The touch screen of the utility model, ratio it is existing there are four one times of key more than keystroke touch screen, can be according to different Key realizes more functions, makes the more convenient convenience of operation.

Claims (3)

1. the more press-key structures of capacitance touch screen, it is characterised in that be provided at least five touch key-press, institute on ito film conductive layer Touch key-press is stated to connect with the conducting wire being printed on the ito film conductive layer respectively；It converges the conductor spacing of all keys It can be connect with FPC wiring board in the edge of the ito film conductive layer；Other than the key and conducting wire on ito film conductive layer Region be non-conducting areas.

2. the more press-key structures of capacitance touch screen according to claim 1, it is characterised in that in the ito film conductive layer Center portion position is provided with key, the periphery of the key is provided with tool annular key jaggy, the four of the annular key Weekly interval is provided with several keys.

3. the more press-key structures of capacitance touch screen according to claim 2, it is characterised in that in the notch of the annular key Two sides be respectively arranged with a key, be arranged at intervals with six press keys in the notch opposite side side of the annular key.