CN103076930A - Touch panel - Google Patents

Abstract

The invention discloses a touch panel, which comprises a capacitive touch structure and a pressure-sensing touch structure. When being touched by a conducting object, the capacitive touch structure can sense touch operation by means of capacitance change. The pressure-sensing touch structure senses touch operation by means of structure deformation, and is arranged on one side of the capacitive touch structure. The pressure-sensing touch structure comprises a first conducting layer, a second conducting layer, an electric field generation structure and a spacing structure. The spacing structure is located between the first conducting layer and the second conducting layer. The spacing structure comprises insulating spacers, conducting spacers and a soft medium. The conducting spacers and the insulating spacers are alternately distributed in the soft medium. The conducting spacers are spaced from the second conducting layer by the insulating spacers.

Description

Contact panel

Technical field

The present invention relates to a kind of contactor control device, particularly relate to a kind of contact panel.

Background technology

From iPhone, Surface to Windows 7, multi-point touch becomes the emerging man-machine interface that replaces keyboard, mouse.Realize the multi-point touch feature capability, must integrate technically the Human Machine Interface of touch-control sensing and control, hardware driving and application, still most important or need to have the contact panel that meets can reach.The range of application of contact panel is quite extensive at present, comprises (1) portable information, consumer electronics and communication product (2) finance or the public information purposes of commercial use (3) industrial use (4) etc.

With present stage, touch technology is the redest as fire product beyond doubt, and the advantages such as multi-point touch, life-span length, high-penetration degree allow touch technology have the rising star that potentiality become the coming years but it is being carried under one's arms.Yet, because contact panel by the user with external object with conduction property for example is, the induction that finger or pointer are carried out surface capacitance changes, it can't use the external object operation of insulation, so, for instance, need to wear glove user in seasonal, habituation, gloves need be taken off and just can carry out the touch-control action, cause the loaded down with trivial details problem of using.

Summary of the invention

The object of the present invention is to provide a kind of contact panel, it can operate with the external object of any kind, unusual facility in the use, and the operating effect of contact panel, operation smooth degree are good.

For reaching above-mentioned purpose, the invention provides a kind of contact panel, it comprises a capacitance type touch-control structure and a pressure-sensing formula touch-control structure.Capacitance type touch-control structure for conductive body when touching by capacitance change with the sensing touch control operation.Pressure-sensing formula touch-control structure is that the deformation by structure comes the sensing touch control operation, and is configured on the side of capacitance type touch-control structure.Pressure-sensing formula touch-control structure comprises one first conductive layer, one second conductive layer, electric field generation structure and a spacer structure.Electric field produces structure ring around the second conductive layer, in order to produce equally distributed electric field in the second conductive layer.Spacer structure is between the first conductive layer and the second conductive layer.Spacer structure comprises insulation spacer, conductive spacer and a soft medium.Conductive spacer and insulation spacer are staggered to be dispersed in the soft medium.Insulation spacer separates conductive spacer and the second conductive layer one spacing.Pressure-sensing formula touch-control structure presses by an external force and to cause spacing to change when touch control operation, and then changes the distribution of electric field, is used for carrying out the detecting of touch-control sensing.

Preferred embodiment cited below particularly, and cooperate appended accompanying drawing, be described in detail below:

Description of drawings

Fig. 1 is the synoptic diagram of contact panel in one embodiment of the invention;

Fig. 2 is the cut-open view of contact panel in one embodiment of the invention;

Fig. 3 is the electrode structure in one embodiment of the invention;

Fig. 4 is the cut-open view of the first touch-control structure in one embodiment of the invention;

Fig. 5 is the cut-open view of contact panel in one embodiment of the invention.

The main element symbol description

10,110,210: the first touch-control structures

12,212: the first conductive layers

14,114: spacer structure

16,216: electric field produces structure

18,118,218: the second conductive layers

20,120: first substrate

22,122: insulation spacer

24,124: conductive spacer

26: soft medium

28,228: the conductive electrode line

30,130,230: the second touch-control structures

32,132: electrode structure

34: the three substrates

36,136: second substrate

D: spacing

S1: the first full-size

S2: the second full-size

Embodiment

Fig. 1 and Fig. 2 illustrate respectively synoptic diagram and the cut-open view of contact panel among the embodiment.Please refer to Fig. 1, contact panel comprises the first touch-control structure 10 and the second touch-control structure 30.The first touch-control structure 10 is configured in than the touch-control side away from the user, and the second touch-control structure 30 is configured in close user's touch-control side.The first touch-control structure 10 is a pressure-sensing formula touch-control structure, and its deformation by structure comes the sensing touch control operation, and the external object that therefore no matter presses is the object of conduction or non-conductive object, all can operate the first touch-control structure 10.

Please refer to Fig. 1, the first touch-control structure 10 can comprise that the first conductive layer 12, spacer structure 14, electric field produce structure 16, the second conductive layer 18 and first substrate 20.The second conductive layer 18 is positioned on the surface of first substrate 20.Electric field produces structure 16 and is positioned on the second conductive layer 18.Spacer structure 14 can be between the first conductive layer 12 and the second conductive layer 18 parallel to each other in fact.In embodiment, the first conductive layer 12 is electrically connected a reference potential, for example earthing potential (Fig. 2).The second conductive layer 18 is configured to contiguous the second touch-control structure 30, the first conductive layers 12 and is configured to away from the second touch-control structure 30.

Referring again to Fig. 1, in an embodiment, the electric field of the first touch-control structure 10 produces structure 16 and is consisted of by being looped around the second conductive layer 18 several conductive electrode lines 28 on every side.In this embodiment, conductive electrode line 28 is distributed in respectively the second conductive layer 18 4 corner places.The conductive electrode line 28 that utilizes electric field to produce structure 16 applies respectively voltage in two diagonal angles, in order to produce equally distributed electric field in the second conductive layer 18.For instance, be to apply identical voltage in four corners by conductive electrode line 28 during operation, make the second conductive layer 18 whole uniform electric fields that form.

Please refer to Fig. 2, spacer structure 14 comprises most insulation spacer 22 and most conductive spacers 24, and it is dispersed in the soft medium 26.Insulation spacer 22 for example can be spheroid with conductive spacer 24 in the present embodiment.Insulation spacer 22 has direction and is essentially one first full-size S1 perpendicular to the first conductive layer 12, and therefore, the spacing that can control the first conductive layer 12 and the second conductive layer 18 equals the first full-size S1.Conductive spacer 24 has direction and is essentially one second full-size S2 perpendicular to the first conductive layer 12.And the first full-size S1 is greater than the second full-size S2, and therefore, insulation spacer 22 is in order to separate formation one space D with conductive spacer 24 and the second conductive layer 18.Moreover, because the first conductive layer 12 is structures of whole, therefore can reduce the field coupled effect between the first conductive layer 12 and the second conductive layer 18 by the control of interval S 1, disturb the uniform electric field of the second conductive layer 18 to distribute to avoid the first conductive layer 12.

Further say it, although conductive spacer 24 distances the second conductive layer 18 is near with respect to the first conductive layer 12, namely at a distance of space D, but the effective capacitance coupling area between conductive spacer 24 and the second conductive layer 18 is little compared to the effective capacitance coupling area between the first conductive layer 12 and the second conductive layer 18, therefore, the coupling between conductive spacer 24 and the second conductive layer 18 can reduce according to this compared to the coupling between the first conductive layer 12 and the second conductive layer 18.Wherein the effective capacitance coupling area is that a surface of conductive spacer 24 or the first conductive layer 12 is towards the projected area of this second conductive layer 18.

On the other hand, since between conductive spacer 24 and the second conductive layer 18 between relative the first conductive layer 12 of formed space D and the second conductive layer 18 formed interval S 1 less, therefore, only need small deformation quantity can carry out the touch control operation of the first touch-control structure 10 between conductive spacer 24 and the second conductive layer 18, relative, can improve the operator at the operation smooth degree that carries out the first touch-control structure 10.

In an embodiment, the condition of insulation spacer 22 and conductive spacer 24 for example distribution density, quantity, size etc. is suitably selected the operating effect that reaches good, for instance, the user just can obtain sensitivity, accurate reaction action with easily strength operation contact panel.Moreover for instance, the first full-size S1: the second full-size S2 is 1.33: 1.In an embodiment, the first full-size S1 is preferably 200 microns.The second full-size S2 is preferably 150 microns.The space D size is preferably 50 microns.But not as limit, as long as can meet the first full-size S1 and the second full-size S2 ratio all in protection scope of the present invention.

The insulation spacer 22 of scattering configuration also can provide its upper and lower element spaced-apart bracing force equably, avoids element to use through permanent, the tired and problem of permanent strain of restoring force after the distortion.

Insulation spacer 22 comprises such as glass, plastic cement, oxide etc.Conductive spacer 24 comprises metal, conducting polymer composite, ITO (indium tin), IZO (indium zinc oxide), AZO (aluminum zinc oxide), ZnO (zinc paste), SnO (monocrystalline tin oxide crystal) etc.In embodiment, soft medium 26 be specific inductive capacity in fact greater than 1 dielectric material, comprise for example air or silicone oil.The first conductive layer 12 and the second conductive layer 18 comprise respectively such as conducting polymer composite, ITO (indium tin), IZO (indium zinc oxide), AZO (aluminum zinc oxide), the transparent conductive materials such as ZnO (zinc paste), SnO (monocrystalline tin oxide crystal).First substrate 20 can comprise the transparent materials such as glass, acryl, polycarbonate (PC), polyethylene terephthalate (PET), pi (PI).

Referring again to Fig. 2, when carrying out the touch control operation of the first touch-control structure 10, it presses by an external object (pointer as shown in FIG.) so that 18 distortion of the second conductive layer, cause the space D between conductive spacer 24 and the second conductive layer 18 to change, and then change the distribution situation of electric field in the second conductive layer 18, calculate coordinate by the difference of Electric Field Distribution situation.

Further say it, in order to reach the touch-control effect, several insulation spacer 22 must be to form staggered configurations of scattering with most conductive spacers 24, so that touch control operation is when occuring, the second conductive layer 18 can go up and conductive spacer 24 formation electric field inductions at an arbitrary position by deformation.For example, as shown in Figure 2, the configuration of each insulation spacer 22 and each conductive spacer 24 distribution interlaced with each other; Yet insulation spacer 22 and conductive spacer 24 configuration quantity interlaced with each other is as limit, also can be the configuration of adjacent conductive spacer 24 distributions interlaced with each other of two adjacent insulation spacer 22 and two; Certainly, also can be, the collocation form of conductive spacer 24 distributions interlaced with each other that insulation spacer 22 and two are adjacent is gone up effect with conductive spacer 24 formation electric field inductions as long as quantitatively can reach the second conductive layer 18 in configuration at an arbitrary position by deformation.

In addition, in operating process, the action that presses needn't make the second conductive layer 18 touch with conductive spacer 24, can reach the sensing effect as long as the space D between conductive spacer 24 and the second conductive layer 18 changes.Yet, in better embodiment, when making between the second conductive layer 18 and the conductive spacer 24, the action that presses touches, and the homogeneity of electric field is also obviously destroyed further, therefore can obtain more strong sensing effect.

The second touch-control structure 30 comprises second substrate 36, the 3rd substrate 34 and electrode structure 32.Electrode structure 32 is disposed between second substrate 36 and the 3rd substrate 34.The 3rd substrate 34 is configured on another surface of first substrate 20 of the first touch-control structure 10.In embodiment, that electrode structure 32 is configured between second substrate 36 and the 3rd substrate 34 to form the second touch-control structure 30, and form after the first touch-control structure 10, the second touch-control structure 30 is configured on the first substrate 20 of the first touch-control structure 10, to form contact panel.

In one embodiment, the second touch-control structure 30 is the projecting type capacitor touch-control structure, and the capacitance change when it is the pointer utilizing the electrode structure 32 be configured between the 3rd substrate 34 and the second substrate 36 to read to have conduction property or finger touches is with the sensing touch-control.Electrode structure 32 is not limited to rectangular patterns layer as shown in Figure 1, also can use as shown in Figure 3 argyle design layer or other suitable patterned layer.

When externally object was conducting objects, touch-control can mainly read by the second touch-control structure 30.Because the second touch-control structure 30 is configured in the side of touching of external object, therefore the external object of conduction can operate contact panel effectively.And no matter external object is conducting objects or insulant, and the structural deformation that the external force of contact surface plate causes all can make the first touch-control structure 10 sensing touch-controls.Wherein because the second touch-control structure 30 is configured in the top of the first touch-control structure 10, namely the second touch-control structure 30 is configured in the touch-control side near the operator, therefore can improve the sensing effect of the second touch-control structure 30.

Fig. 4 illustrates the cut-open view of contact panel among another embodiment.The difference of contact panel shown in Figure 4 and contact panel shown in Figure 2 is, has omitted the 3rd substrate 34 of contact panel shown in Figure 2.In this embodiment, forming the first touch-control structure 110, andelectrode structure 132 is configured on thesecond substrate 136 to form after the second touch-control structure 130, thefirst substrate 120 that theelectrode structure 132 that makes the second touch-control structure 130 andsecond substrate 136 are formed on the first touch-control structure 110 jointly is on the surface of this second touch-control structure 130, and whereinsecond substrate 136 is as overlay.

Fig. 5 illustrate and another embodiment in the cut-open view of contact panel.The difference of contact panel shown in Figure 5 and contact panel shown in Figure 2 is, the secondconductive layer 218 of the first touch-control structure 210 is configured to be configured to contiguous the second touch-control structure 230 away from the firstconductive layer 212 of the second touch-control structure 230, the first touch-control structures 210.Similar with the contact panel that Fig. 1 illustrates, theconductive electrode line 228 that electric field producesstructure 216 is distributed in the secondconductive layer 218 4 corner places.

The disclosed contact panel of above-described embodiment comprises the first touch-control structure, and its deformation by structure comes sensing to touch, and the external object that therefore no matter presses is the object of conduction or non-conductive object, all can operate contact panel, unusual facility in the use.The condition of insulation spacer and conductive spacer is suitably selected the operating effect that reaches good.The insulation spacer of scattering configuration can provide its upper and lower element spaced-apart bracing force equably, therefore can avoid the problem of element distortion after permanent the use.The first touch-control structure also can use with other touch-control structure collocation, is rich in design polynary variability.

Although disclosed the present invention in conjunction with above preferred embodiment; yet it is not to limit the present invention, anyly is familiar with this operator, without departing from the spirit and scope of the present invention; can do a little change and retouching, thus protection scope of the present invention should with enclose claim was defined is as the criterion.

Claims (11)

1. contact panel comprises:

Capacitance type touch-control structure, for conductive body when touching by capacitance change with the sensing touch control operation;

Pressure-sensing formula touch-control structure is configured in a side of this capacitance type touch-control structure, and its deformation by structure comes the sensing touch control operation, and this pressure-sensing formula touch-control structure comprises:

The first conductive layer;

The second conductive layer;

Electric field produces structure, is looped around around the second conductive layer, in order to produce equally distributed electric field in this second conductive layer; And

Spacer structure, between this first conductive layer and this second conductive layer, wherein this spacer structure comprises:

A most insulation spacer;

A most conductive spacer; And

Soft medium, those conductive spacers and those insulation spacer are staggered to be dispersed in this soft medium, and those insulation spacer separate those conductive spacers and this second conductive layer one spacing;

Wherein this pressure-sensing formula touch-control structure is when touch control operation, presses by an external force to cause this spacing to change, and then changes the distribution of this electric field, is used for carrying out the detecting of touch-control sensing.

2. contact panel as claimed in claim 1, wherein this first conductive layer is parallel in fact this second conductive layer, those insulation spacer have direction and are essentially one first full-size perpendicular to this first conductive layer, those conductive spacers have direction and are essentially one second full-size perpendicular to this first conductive layer, and this first full-size is greater than this second full-size.

3. contact panel as claimed in claim 2, wherein this first full-size: this second full-size is 1.33: 1.

4. contact panel as claimed in claim 1, wherein this spacing is 50 microns.

5. contact panel as claimed in claim 1, wherein this pressure-sensing formula touch-control structure is configured in the touch-control side away from the user, and this capacitance type touch-control structure is configured in the touch-control side near the user.

6. contact panel as claimed in claim 1, wherein the effective capacitance coupling area between this conductive spacer and this second conductive layer is little compared to the effective capacitance coupling area between this first conductive layer and this second conductive layer, and wherein this effective capacitance coupling area namely a surface of this conductive spacer or this first conductive layer towards the projected area of this second conductive layer.

7. contact panel as claimed in claim 1, wherein this second conductive layer is configured to away from this capacitance type touch-control structure, and this first conductive layer is configured to contiguous this this capacitance type touch-control structure.

8. contact panel as claimed in claim 1, wherein this second conductive layer is configured to contiguous this capacitance type touch-control structure, and this first conductive layer is configured to away from this this capacitance type touch-control structure.

9. contact panel as claimed in claim 1, wherein this pressure-sensing formula touch-control structure also comprises first substrate, this second conductive layer is positioned on the surface of this first substrate.

10. contact panel as claimed in claim 9, wherein this capacitance type touch-control structure comprises:

Second substrate;

The 3rd substrate; And

Electrode structure is disposed between this second substrate and the 3rd substrate, and wherein the 3rd substrate is configured on another surface of this first substrate.

11. contact panel as claimed in claim 9, wherein this capacitance type touch-control structure comprises:

Electrode structure; And

Second substrate, wherein this electrode structure and second substrate are formed on another surface of this first substrate of this first touch-control structure jointly, and this second substrate is as overlay.

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