WO2006045209A2

WO2006045209A2 - Input device

Info

Publication number: WO2006045209A2
Application number: PCT/CH2005/000601
Authority: WO
Inventors: Christoph Keist
Original assignee: Dätwyler I/O Devices Ag
Priority date: 2004-10-26
Filing date: 2005-10-13
Publication date: 2006-05-04
Also published as: WO2006045209A3

Abstract

The invention relates to an input device for inputting signals into an electronic unit, during which the transfer of user-induced position data and/or discrete data is made possible in a simplified and intuitive form. To this end, a touch panel is provided for inputting position data via which position data of an input object (finger, stylus) located, from above, in contact with the touch panel (1, 16) are transmitted to the processor. In addition, at least two specifically allocated touch areas (6) are provided via which discrete inputs made using an input object can be transmitted to the processor. The touch areas (6) are integrated in the touch panel (1, 16) and form a portion thereof, and at least one tactile means (4, 26) is situated underneath the touch panel (1, 16) whereby giving a tactile response according to the force exerted by an input object in a touch area (6).

Description

DESCRIPTION

TITLE input device

TECHNICAL AREA

The present invention relates to an input device for inputting signals into an electronic device, and to methods for its operation and uses of such an input device.

STATE OF THE ART

Nowadays almost all computerized devices require the input of position data (mouse, touchpad or the like) as well as discrete input values (keyboard input). Not only in computers but also in mobile phones, PDAs, and increasingly also in electronic measuring devices and the like and in input fields in vehicles, etc.

In doing so, the functions of inputting position data become. and the input of discrete values typically completely separated and arranged in two different areas (eg, touchpad and adjacent keyboard, see, for example, EP 0 672 980). Such solutions take up a lot of space and, moreover, depending on whether position data should be transferred or whether a keyboard input should be made, a displacement of the input object (for example Finger, hand, stylus, etc.) required.

Accordingly, there are already approaches (see, for example, US 2004/0196270) in a single input area to allow both the input of position data and the input in the form of a keyboard input. Although such approaches solve ^' partially the mentioned problems of two adjacent input options, but usually require a targeted active transition between the two input modes, and the keyboard function is perceived by the users due to the typically completely flat as a result of touchpad sensors input level as unpleasant because there is no orientation aid for the keyboard input beyond the optical orientation.

PRESENTATION OF THE INVENTION

The object of the invention is therefore to propose an improved input device which combines both the possibility of position input and of discrete data input (keyboard input) in a single input field without having the disadvantages of the prior art.

The solution to this problem is achieved in that the input device for inputting signals into an electronic device with at least one processor (eg computer, measuring device, mobile phone, automobile control or the like) comprises at least the following elements: a touchpad for inputting position data, via which position data of a transmitted to the processor with the touchpad from above in contact input object; and at least one (preferably at least two) specifically assigned, and usually ^• visually ^• and / or haptically marked key area, via which discrete inputs are transmitted to the processor with an input object. The key areas are integrated in the touchpad and preferably form an integral part of the same. Furthermore, at least one tactile means is arranged below the touch panel, which is dependent on an input object in a key area applied force gives a tactile feedback.

The core of the invention is therefore to provide in a touchpad for the input of position data areas (key areas) in which, if operated with sufficient pressure from above, a tactile feedback occurs. This allows the user a very intuitive and keyboard-like operation, and at the same time gives a clear separation of the input of position data and discrete keyboard data. It turns out, surprisingly, that in particular the tactile feedback is crucial for the generation of a "keyboard feeling", and less, as is possible, for example, via appropriate software, a sole generation of an acoustic feedback.

Preferably, the entire touchpad forms a substantially closed surface.

According to a first preferred embodiment, the touchpad or the entire input area of the input device is designed as an x-y-z sensor.

According to a further preferred embodiment, the separation of the input of position data and keyboard input is ensured by a specific assignment of corresponding force ranges during the input. Thus, for example, with a force of the input object (eg finger or stylus) perpendicular to the plane of the touchpad of less than a defined limit force, preferably a force of less than 2N or further preferably less than 1.5N, positional data will only be sent to the processor transmitted. Furthermore, in the case of a force of the input object perpendicular to the plane of the touchpad of more than a defined limit force, preferably at a force of more than 2N, the respective key area is activated and only a discrete input corresponding to the associated key area is transmitted to the processor, and at the same time only then a tactile feedback. Of course, the key ranges can be assigned differently depending on the input mode. With a force of the input object perpendicular to the plane of the touchpad in the range of 0.2N to 1.5N, positional data are preferably transmitted to the processor, and with a force of the Input object perpendicular to the plane of the touchpad of more than 2N, the respective key area is activated and it is exclusively one of the associated key area corresponding discrete input übeπnittelt to the processor, and simultaneously there is a tactile feedback. As already mentioned, according to the invention the tactile feedback is a tactile feedback modeled on a mechanical keyboard key. According to a preferred embodiment of the invention, for example, the tactile agents are passive tactile agents, such as a silicone membrane, a metal frog, and / or a polydomial film. Under passive is to be understood that these tactile means are not driven to produce a tactile feedback. In this case, for example, metal frogs may be used which require a force of 2-4N, which have diameters in the range of 2-15 mm, and which provide a path in the range of 0.1-1 mm or more.

It proves to be advantageous if the touchpad is flexible in the z-direction. This can be achieved, for example, by taking the below

Touchpad a flexible sensor is arranged in the z-direction, which acts as an x-y-z sensor. Typically, below the sensor, a flexible plate (actuator) is arranged, below which at least one (preferably at least two) tactile

Means is arranged on a preferably rigid floor. In this case, a circuit board can be arranged between the tactile means and the ground in order to recognize the keyboard function.

In order to allow only a flexibility in the z-direction in the key areas, it is possible according to a further preferred embodiment, below the touchpad and preferably above the sensor to arrange a rigid grid, which has recesses in key areas and thus only there flexibility in z Direction results.

Alternatively, it is possible to arrange a tactile means between the touch panel and a sensor arranged on a rigid base.

It is not only possible to provide a flexible touchpad in the z-direction, but it is also possible to use a rigid touchpad. This can then be in the z direction movably guided, wherein below the touch panel, a single (or more) tactile means is arranged. In this case, the xy data detected to identify which key was effectively actuated is detected by the xy sensor and not via corresponding contacts or the like in the area of the tactile means, since the same tactile means is activated each time the touch panel is actuated. In this case, it is possible to provide blocking means (eg plungers) which only release the mobility of the touchpad in the z direction when position data from a key area are transmitted to the processor. Likewise, it is possible with a flexible touchpad, with a rigid grid in the area of the keys, ie at the recesses also provide rigid key areas, and lock them individually via corresponding blocking means, if not position data from a key range are transmitted to the processor.

In principle, the touchpad can also be directly a screen which is particularly preferably an xy sensor, in particular preferably an OLED screen. In general, the sensor for xy or xyz data acquisition in the form of a capacitive, a resistive, a piezoelectric sensor, or a contact foil sensor can be present. In the latter case, the contact film sensor below a touch panel or flexible with this integrally formed are, and at least two may be at least partially by at least one Distanzl ^'olie separate conductor portions have.

As a tactile feedback in the context of this invention, in particular a noticeable movement in the z-direction to some extent in the depth of the input field to understand. It acts up to a certain force from above a large counterforce of the surface (touchpad) and there is no movement, for example. of the finger in z-direction possible. The counterforce of the surface of the Tasfeldes abruptly decreases after reaching a certain force and only then takes place the movement of the input object (such as fingers) in the z-direction.

In order to provide guidance to the user on the surface in addition to the tactile feedback, it is possible to project at least one key area over the surface plane of the touch panel or as a recess train. In particular, concave or convex, preferably circularly symmetrical shapes in the key areas prove to be pleasant. The sensation as a keyboard can be additionally supported by an acoustic feedback takes place in addition to the tactile feedback, which can be generated directly via specifically provided means in the input device.

In particular, for example in the field of mobile phones, PDAs or in the field of

Input devices for automobiles, it proves to be advantageous, in addition to funds for

Illumination of the touch panel particularly preferred to provide illumination of the key areas or the regions surrounding the key areas. In this context, it proves to be advantageous to form the touch panel at least partially transparent to the passage of from behind or within the

Touchpad to allow generated light. For example, this is possible by using as

Means for illuminating LED's or electroluminescent sheets are used, optionally in combination with a reflective layer. According to a very particularly preferred embodiment of the input device according to the invention passive tactile means are arranged on a substantially rigid bottom, which together with electrical or electronic detection means such as a printed circuit board (also Flexprint) to convert the actuation of the tactile means to a signal, which then used to can be to register pressing a button. In this case, this "substructure" can either be designed so that only the general pressing of at least one key is registered, and that the assignment of which of the keys is pressed takes place via the sensor. However, it can also be designed to provide specific signals for each key from that "substructure". On top of that a flexible sensor plate is placed, and on it an xy or an xyz sensor. If a backlighting is desired, an electroluminescent film and / or a decorated film may be arranged on this sensor. On this (these) foil (s) or directly on the sensor then a downwardly planar flexible touchpad is normally arranged from a transparent material. It is also possible, for example, if LEDs or other light sources are arranged below the sensor, the sensor to make it transparent or recessed at certain points so that the light can escape upwards.

Preferably, the flexible sensor plate and the flexible touchpad have a hardness in the range of about 20-70 Shore A. The flexible sensor plate preferably has a higher hardness than the flexible touchpad. In particular, the flexible sensor plate has a hardness in the range of 70 Shore A, and the flexible touchpad has a hardness in the range of 40 Shore A.

The flexible sensor plate normally has a planar surface upwardly of the sensor, and in the area of the tactile means it has downwardly protrusions or noses directed towards the tactile means, and optionally, downwardly disposed supports between the tactile means for supporting the flexible sensor plate.

If a resistive sensor is used as the sensor, then it is also possible to arrange on the flexible touchpad at least one rigid cap, particularly preferably made of plastic, which covers areas of the flexible touchpad, such caps preferably being arranged in the key areas. The rigid cap can be a navigator which can not only be actuated in the z direction, but can also be used to transfer transverse data via tilting movements of the cap. Basically, it turns out that when using a resistive sensor, the individual layers should preferably not be glued together. Quite different when using a capacitive sensor, there should preferably the individual layers are glued together over the entire surface.

Furthermore, the present invention relates to a method for operating such an input device. The method is characterized in particular by recording or respectively registering a position report exclusively with a force of the input object perpendicular to the plane of the touchpad of less than a defined limiting force, preferably a limiting force of less than 2N or even less than 1.5N, and the keyboard input in a key area exclusively with a force of the input object perpendicular to the plane of the touchpad of more than a defined limit force, preferably a limit force more than 2N occurs. Particularly preferably, in the case of a force of the input object in a key area perpendicular to the plane of the touchpad of more than the limit force, an automatic compensation of previously and / or subsequently evaluated position data is performed.

Last but not least, the present invention relates to the use of an input device as an input device for a mobile phone, a computer, an electronic measuring device, a PDA, and hybrid forms thereof, particularly preferably as an input area in an automobile.

Further preferred embodiments of the invention are described in the dependent claims.

BRIEF EXPLANATION OF THE FIGURES The invention will be explained in more detail below with reference to embodiments in conjunction with the drawings. Show it:

Fig. 1 a) shows a schematic section through a simplified input device according to the invention; b) a view of a possible input device;

Fig. 2 a) -q) show different architectures of input devices according to the invention in schematic sections; and

Fig. 3 a) -c) different further preferred architectures of input devices according to the invention in schematic sections.

WAYS OF CARRYING OUT THE INVENTION FIG. 1 a) shows a section through a simplified input device according to the invention. In a housing 5, tactile elements 4 in the form of a metal frog, a polydim film or a silicone membrane are arranged on the bottom of the housing, in each case where a key is arranged above. On these tactile Elements 4 is a flexible sensor plate, a so-called actuator 3, which rests in particular on the tactile elements 4 from above. In this case, as in Fig. Ia), these bearing surfaces may be formed as specific, directed downwards on the tactile elements projections. The actuator 3 has at the top a flat surface on which a flexible xyz sensor 2 is arranged. On this flexible sensor 2, a flexible touchpad 1 respectively keypad is arranged. The touch panel 1 has a closed surface on which the key areas 6 are marked by corresponding characters, symbols or a decoration.

As also indicated in FIG. 1 a), the key areas 6 can also be designed as elevations, as shown in the left area, or, as shown in the right area, as depressions formed in the key area. For lighting are also z. B. at the edge, typically invisible behind an upwardly delimiting housing part from the front, lighting means, specifically arranged LEDs, which the

Touchpad 1, which is semitransparent at least partially in this case, can backlight.

In Fig. Ib) such an input device is shown with four key areas in a plan view, wherein additionally a display panel is arranged.

In operating such an input device, the total flexibility of the tactile means 4 and overlying layers 1-3 is typically adjusted to provide tactile feedback at a pressure greater than 2N. Simultaneously, the sensor 2 is controlled such that only when a pressure on the sensor 2 in the z direction (ie in Fig. 1 a from top to bottom vertically) of also typically more than 2N an input in the sense of a key input takes place, via the xy position values (ie, the position values in the plane of the surface of the touchpad 1) measured at this pressure by the sensor 2 are used to identify which of the keys has been actuated. It is crucial that the z- sensitivity of the sensor is matched with the flexibility of the tactile means 4 and the overlying layers 1-3, so that the tactile feedback in each case only occurs when an input is actually taken over by the sensor 2 , respectively, an input from the sensor 2 is only accepted, albeit a tactile Feedback takes place. The input can be done for example with a finger, the palm or with a dedicated tool such as a specially designed, rounded pin.

The following functions are possible: • x-y-z sensor for navigating on a screen in x-y coordinates, low z-force (about 0.2- 15N in z-direction)

• x-y-z sensor for handwritten text input with finger or pencil, low z-force (about 0.2- 15N in z-direction)

• x-y-z sensor in combination with tactile element 4 for operating keys 6 in certain x-y coordinates or as a mouse click while navigating, high z-

Force (typically more than 2N, tactile element 4 responds)

FIGS. 2a) -q) show different variants of a construction of such input devices. In Fig. 2a), the possibility is shown below the tactile elements 4, a printed circuit board 9 or a printed circuit board film (Flexprint) to install. The printed circuit board 9 under the tactile element 4 is used to recognize the key function. The printed circuit board 9 thus triggers the key functions as in a conventional keyboard, i. when the metal dome in the middle touches the PCB. This exemplary embodiment has the advantage that the key functions do not have to take place via the z-sensitivity of the sensor 2, so in this case the sensor 2 can be a pure x-y sensor. In addition, the adaptation of response in the z-direction of the sensor 2 and tactile feedback is avoided as mentioned above, since a keyboard input by design only takes place when the metal dome 4 is pressed down on the circuit board.

A further alternative exemplary embodiment is shown in FIG. 2b). Here, the tactile element 4 is arranged on the sensor 2 and there is no actuator. The sensor 2 is actuated via the flexible keypad 1. The tactile element 4 is located directly on the Sensor 2. In this area of the tactile elements, the sensor function is limited in terms of the position input in xy. However, when the tactile element 4 is actuated, the keyboard function can be detected directly via the position of the impact, and it is therefore possible to use only one xy-sensitive sensor here as well. But it is also possible to recognize the function of the increased force for actuating the tactile element 4, in which case an xyz-sensitive sensor 2 must be used.

In principle, the keypad can be transparent or colored, and it can also be hard or rigid (see Fig. 2c) or soft, as mentioned above. The material for the touchpad 1 and equally for the actuator 3 may be silicone, TPE (thermoplastic rubber), rubber or even a plastic film, leather, textile, slush skin, etc. The keys can be slightly molded (recessed or raised), there can be grids with grooves or webs, the surface can be textured or smooth. As further shown in Fig. 2c, instead of the flexible touchpad 1, a flexible screen 10 (for example, LCD or OLED) can be used with sensor 2 underneath. The screen and the sensor can also be integrated.

As also shown in Fig. 2d, it is also possible to use a rigid unit 16 in the form of, for example, an xy-sensitive screen 16. In this case, the tactile feedback is provided only by a tactile element 4, and the entire above the tactile element 4 arranged unit of screen 16 and actuator 14 is rigid, but only controlled in the z direction displaced, which for example via corresponding guides ( Guide piece 12 and guide bore 13) can be ensured. In this embodiment, regardless of which key is pressed, the entire unit of screen 16 and actuator 11 is moved down in the z-direction, thus the information which key is pressed on the xy sensitivity of the screen (possibly in combination with a sensor 2), and the information of a key input either via the z-sensitivity of the sensor 2 and the screen or via a arranged on the bottom of the housing 5 circuit board (in Fig. 2d not shown).

As shown in Fig. 2e), it is possible to provide the sensor on a fixed plate with a divided keypad. The subdivided keypad results in a unique key position: a fixed grid or rigid grid 14 is placed in the keypad below the sensor 2, so that the actuation of the tactile element 4 only in the keys, where recesses 15 are provided, and not in between, can take place. The grid 14 is anchored to the housing 5. The grid can also be mounted above the sensor.

Furthermore, it is possible, as shown in Fig. 2f), to provide a position-dependent key lock: a plunger 17 is depending on the x-y position of the operated sensor, an actuation of the button in the z-direction free or not. Thus, a clear separation of the keys and the intermediate areas between the keys is possible. The plunger 17 is controlled by software. As a ram 17, e.g. a hydraulic

Cylinder or an electromagnetic lock can be used. The plunger 17 can also simultaneously assume the function of the tactile element 4, if this is a corresponding electronic control for the simulation of the tactile feedback is deposited.

Fig. 2g) shows a further embodiment with defined fields of operation: Below the x-y-z sensor 2, a printed circuit board 20 is placed with contacts and a spacer foil 19, wherein the oppositely disposed contacts 18 are mounted on the underside of the sensor 2 only under the keys. The force for actuating the contacts 18 is below the actuation force of the tactile element 4. If a button is pressed in the area provided, the contact closes and the plunger 17 releases the tactile element 4. The plunger 17 may e.g. a bi-metal strip which heats and bends when current flows.

The sensor 2 must be flexible enough to trigger the tactile element 4 (except for a rigid, rigid sensor plate with an element and guides) and in turn "direct" the tactile feedback 2. These sensors 2 are often referred to as touchpads eg possible: • Resistive (Force Sensing Resistor FSR). On thin and flexible film in use.

• Capacitive. Disadvantage: expensive and limited temperature resistance.

• Piezo. Very expensive. Alternatively, it is possible to use a film with printed contacts as shown in Fig. 2h: A film 1, for example made of silicone or PC is printed as a keypad, on the back with contacts 21. Below this is a second foil 20 with the mating contacts and a spacing element 19, e.g. a foil with holes at the contacts 21. If you now press lightly with your finger, the contact closes. This method is very favorable, but the resolution of the x-y position is not very fine. Also, two such complete layers can be superimposed to separately detect x and y, giving rise to a higher resolution.

For the key function, a second printed circuit board 9 is used, since the sensor system configured in this way can not measure forces in z.

Again, the button foil can be molded, printed and backlit (LED 7), the films can be transparent except for the tracks. Such a structure with a foil with printed contacts is shown in Fig. 2h). An alternative to this is shown in Fig. 2i), here is the flexible touchpad with contacts made of carbon conductive paint, and the actuator is designed as a flexible sensor plate 22 with printed mating contacts.

As mentioned, a rigid sensor plate can also be used. If the sensor is provided on a solid carrier plate, the following advantages result: Sensor mounted fixed, only one (or a few) tactile element 4 for all buttons, large stroke possible. Disadvantages: Good guidance in the z-axis necessary, all buttons make stroke when pressed, no synchronous key presses possible (see also Fig. 2d-g). This situation is shown in Fig. 2k), where a flexible or fixed touchpad 23 is provided on a fixed sensor plate / actuator 11. The actuator 11 is provided with guide pins 12, which are guided in guide holes 13 in the housing. As can be seen in FIG. 21), a flexible sensor plate 3 supported in the regions between the tactile elements 4 can be used for better support of the sensor 2.

It is also, as shown in Fig. 2m), possible to use the silicone switching mat 25 directly as a support plate and tactile element.

The following constructions are possible as tactile elements: metal domes individually or as a metal dome array; Polydomfolie; Silicone dome with membrane individually or as switching mat. The use of a silicone dome 26 is illustrated in Fig. 2n). In principle, other force-dependent snap devices are possible. Also in terms of decoration are in a construction according to the invention many possibilities. The top can be printed (positive or negative), the top can be sprayed and lasered (day-night design) on transparent upper, the top can be coated for protection and feel (Sealplast), and it can be transparent on the back Upper material to be printed (positive or negative).

As shown in Fig. 2o), the decorated layer 28 may be disposed between sensor 2 and transparent upper 27 (flexible keypad, transparent), e.g. Photo, also interchangeable, or template or textiles etc.

Furthermore, it is possible to provide a backlight. In this case, for example, LEDs can be arranged on the sides, an LED can be provided on the sensor.

As can be seen in Fig. 2p), it is possible to provide a flexible reflective layer for light 29 (aluminum foil / mirror). The symbols 6 can be generated by the laser (day-night design). It is also possible, as shown in FIG. 2q), to directly print an EL film 30 (electro-luminescence) onto the sensor 2 or to provide it on a separate film.

The individual elements can basically be combined with each other as desired. Exemplary applications are the following:

• Mobile phone input unit, PDA, replaces touch screen, navigator, voice input and keyboard

• Navigation systems, car radio • Window regulators, mirror adjusters, sunroof adjusters

• PC / notebook touchpad with integrated mouse click

• Touch screen with tactile feedback

A further preferred embodiment is shown in FIG. 3 a). In this case, a circuit board 9 is first arranged in a housing 5 on the bottom of the housing. On the circuit board are passive tactile elements 4 in the form of e.g. arranged by metal frogs (or polydom films). The printed circuit board 9 can also be designed as a flexprint. It is possible to design the printed circuit board 9 either so that only one single yes / no signal is generated at a pressure on any metal frog for the entire circuit board 9, and the information which metal frog has been pressed on the position information of the sensor 2 is provided. However, since it is possible under certain circumstances that two keys are pressed simultaneously, and since the sensors 2 usually provide an averaged signal in such situations, to which then the two pressed keys can no longer be assigned, it can be considered prove advantageous to design the circuit board 9 so that an individual and specific output signal is generated for the pressing of each metal frog.

For example, the metal frogs are products of Nicomatic (Round Metal Dome 5mm, 2N Force, 0.17mm Path, Type: N5-R-MD-200-21), Inovan (4-leg Metal Pins 12.2mm, 4N Force , 0.65mm way, type 40185300), but other models can be used depending on needs and requirements. In terms of a simple and reliable construction, it is advantageous to use passive tactile elements which, unlike active elements, do not require separate driving. On the circuit board 9 lighting elements (LED) 7 are arranged. For example, products such as Citizen Electronics Co. LTD.: CitiLED CL-191-WA-DT are possible. In order for the light generated by these lighting elements to be visible on the surface of the keys, transparent regions 31, typically in the region of the keys, are provided in the sensor 2. The layers 1 and 3 are in this case at least partially transparent or translucent designed, and also the sensor must be at least partially transparent or translucent or have recesses.

Next on the metal frogs 4 is a lower flexible sensor plate 3. It is a silicone mat which has downwardly directed projections 33 in the area of the metal frogs 9. A support of the sensor plate 3 in the area between the metal frogs 4 can be ensured either by the lighting elements 7, but can also, as will be explained below in connection with Figure 3 b), by additional projections / noses / nipples in the form of supports 32 be ensured. In this case, a substantially transparent silicone material is used, which has a hardness in the range of 20-70 Shore A, with a hardness of about 70 Shore A is preferred. For example, it is possible to use products from Dow Corning (HTV Silicone Transparent 70 Shore A, type B6670). The sensor plate 3 has a thickness in the range of 0.5 mm - 5 mm, a thickness of about 1 mm (thickness in the region with protrusions or supports) is preferred.

On the flexible sensor plate 3, the actual sensor 2 is now placed. It can be an xy sensor or xyz sensor type sensor. Furthermore, it can be a resistive (eg force sensing resistor FSR technology: IEE, Co-Ordinates Pressure Sensing Sensor (CPS2) or Tekscan, FlexiForce matrix sensor) or a capacitive sensor (eg Cirque, glide sensor HTS 400/900 or Synaptics; TouchPad) act.

If a resistive sensor 2 is used, it should generally be ensured in a preferred manner that the individual layers are not glued to one another but only lie on one another. If a capacitive sensor 2 is used, so should Preferably, the individual layers are glued together over the entire surface.

In the case of FIG. 3, in each case a sensor of the IEE (Luxembourg) type Co-Ordinates Pressure Sensing Sensor (CPS2) was used which has a thickness of approximately 0.2 millimeters and in which the resistive layer relevant for the measurement is present between thermoplastic films is arranged. The value of the standby resistor is more than 4 MΩ, it has a response time in the range of 1-2 ms and has a geometric resolution of <0.1 mm. With regard to the control or the type of reading of such a sensor, reference is made to the specifications of the product CP S2 which are publicly available from IEE. In the sensor 2 transparent areas 31 are provided. This, so that the light emanating from the lighting elements 7, which are arranged below, light can pass up to the user in the area of the keys. It would also be possible to arrange such transparent areas around keys, or to effect the labeling of the keys by the design of these recesses of the typically non-transparent resistive layer of the sensor 2. In the latter case could even be dispensed with the characters 6.

This is also a transparent and flexible silicone mat, with a hardness in the range of 20-70 Shore A, wherein this upper silicone mat 1 is preferably softer than the lower silicone mat 3, so that the sensor not too deformed when a key is actuated). A hardness in the region of 40 Shore A is preferred. For example, it is possible to use silicone mats from Dow Corning; HTV Silicone Transparent 40 Shore A; Type B6640.

In the case of FIG. 3 a, the flexible touchpad 1 is provided with printed or similarly applied characters or symbols 6 in the area of the key functions. In addition, the touch panel extends under a projection of the housing 5 and is held in the housing 5. Alternatively, it is possible to make the .flexible touchpad 1 larger and form as the entire surface of the component. In addition, it is possible to form the entire component to some extent as a sensor embedded in silicone. As already mentioned above, in the case of a resistive sensor, it is preferable to leave the individual layers only on top of each other and not to stick together. Accordingly, in such a sensor, the flexible touchpad 1 or the underlying layers should be connected to each other only in the region of the edge of the component or in the region of transparent recesses, either via a projection of the housing as shown in Figure 3a, or via another way of attachment such as sticking, pressing, etc.

In Figure 3b) an alternative embodiment is shown. The illumination is not guaranteed in this case by LEDs 7, but rather by an electroluminescent 30. This is placed between the flexible touchpad 1 and the sensor 2. This is, for example, an electroluminescent film from Rogers Corporation (Durel DFLX Flexible Electroluminescent Lamp with D365 Low-noise Backlight IC Driver).

Since no lighting elements 7 are present in this case, which support the flexible sensor plate 3 from below, supports 32 are additionally provided in the areas between the actual keys and possibly peripherally at the edge, that is, downwardly extending projections.

Incidentally, it is also possible to provide a decorated sheet 28 over and / or under the entire touch panel or areas thereof. This is a flexible film (for example, as used for presentation), which is placed for example between the electroluminescent film 30 and the flexible touchpad 1, or which can also be applied to the flexible touchpad 1. The film 28 is pre-printed, which makes it possible to adjust colors and / or symbols above. Of course, it is also possible to directly print the electroluminescent film 30, for example, in a partially translucent manner, so that the electroluminescence appears through. It is also conceivable to make such a film 28 replaceable, so that it can be printed as needed, for example, in a conventional printer, or by different films 28 are made available for different uses, this depending on needs. In case of using an electroluminescent film must Of course, the touchpad 1 be at least partially transparent or at least translucent.

FIG. 3 c) shows yet another embodiment. In this case, a resistive sensor is used as the sensor, and rigid plastic caps 34 are disposed on the keys. In the areas of the caps 34 thus the x-y sensitivity of the sensor is limited if not even not available. In the intermediate areas but already. A particularly preferred embodiment of such caps 34 may be, for example, to use such caps in the sense of an integrated navigator, wherein the respectively read at the edges of the caps 34 from the sensor coordinates are read out and evaluated by the electronics specifically to this navigator function. In other words, the position values read out at the edge of the caps 34, which are generated by the navigator responding to pressure in all directions, are evaluated in the sense of the navigator (analogous to joystick). For unambiguous evaluation, the cap 34 can also be provided with three or four or more specific downward "feet" in which the pressure is then read out specifically.

The advantages of this design are the very low height (1-4 mm possible, including housing), the low price, the possible backlighting using electro-luminescent films, and the closed surface (reduced susceptibility to soiling).

LIST OF REFERENCE NUMBERS

1 flexible touchpad

2 flexible x-y-z sensor

3 flexible sensor plate, flexible actuator

4 tactile element

5 housing

6 signs / symbols / decoration

7 lighting (LED)

8 display field (display)

9 PCB / Flexprint

10 flexible screen

11 rigid sensor plate

12 guide pin

13 pilot hole

14 rigid grid

15 recesses in 14

16 rigid screen

17 pestles

18 contacts under the buttons

19 spacer foil

20 circuit board

21 printed / applied contacts

22 flexible sensor plate with printed contacts 23 flexible or rigid keypad

24 supported flexible sensor plate

25 silicone switching mat

26 Silicone dome 27 flexible touchpad, transparent

28 decorated foil

29 flexible reflective layer

30 electro luminescent film

31 transparent areas in sensor 2 ° 32 supports

33 downward protrusions of 3

33 hard plastic caps on key areas

Claims

PATENT CLAIMS

1. Input device for inputting signals into an electronic device with a processor comprising a touch field for entering position data, via which position data of an input object in contact with the touch field (1, 16) from above is transmitted to the processor, at least two specifically assigned ones Key areas (6), via which discrete inputs are transmitted to the processor with an input object, the key areas (6) being integrated into the touchpad (1, 16) and

Form part of the same, and wherein at least one tactile means (4, 26) is arranged below the touch panel (1, 16), which gives tactile feedback depending on the force applied by an input object in a key area (6).

2. Input device according to claim 1, characterized in that the touch panel (1) forms a substantially closed surface.

3. Input device according to one of the preceding claims, characterized in that the touch field is designed as an xyz sensor (2).

4. Input device according to one of the preceding claims, characterized in that with a force of the input object perpendicular to the plane of the touch field of less than a defined limit force, preferably of less than 2N, further preferably of less than 1.5N exclusively

Position data is transmitted to the processor, and that with a force of the input object perpendicular to the plane of the touch field The respective key area (6) is activated by more than a defined limit force and only a discrete input corresponding to the associated key area (6) is transmitted to the processor, and at the same time a tactile feedback occurs.

5. Input device according to claim 4, characterized in that when the input object is force perpendicular to the plane of the touch field in the area below a defined limit force of preferably 0.2N to 1.5N, only position data is transmitted to the processor, and that when the input object is force perpendicular to the level of the touch field of more than a defined limit force, preferably more than 2N, the respective key area (6) is activated and only a discrete input corresponding to the associated key area (6) is transmitted to the processor, and at the same time a tactile feedback occurs.

6. Input device according to one of the preceding claims, characterized in that the tactile feedback is a tactile feedback modeled on a mechanical keyboard key.

7. . Input device according to one of the preceding claims, characterized in that the touch field is designed to be flexible in the z-direction.

8. Input device according to claim 7, characterized in that a sensor (2) which is flexible in the z direction is arranged below the touch panel (1), which acts as an xy and/or as an xyz sensor.

9. Input device according to claim 8, characterized in that a flexible plate (3) is arranged below the sensor (2), below which at least a tactile means (4,26) is arranged on a rigid floor (5).

10. Input device according to claim 9, characterized in that a circuit board (9) is arranged between the tactile means (4, 26) and the base (5) or the tactile means (4, 26) is designed as part of a circuit board (9).

11. Input device according to one of claims 7-9, characterized in that a rigid grid (14) is arranged below the touch panel (1) and preferably above a sensor (2), which has recesses (15) in key areas (6). .

12. Input device according to claim 8, characterized in that a tactile means (4, 26) is arranged between the touch panel (1) and a sensor (2) arranged on a rigid floor (5).

13. Input device according to one of claims 1-6, characterized in that the touch panel (16) is rigid and is movably guided (12, 13) in the z-direction, with a single tactile means (4) below the touch panel (16). is arranged.

14. Input device according to claim 13, characterized in that blocking means (17) are arranged which only enable the mobility of the touch panel (16) in the z direction when position data from a key area (6) are transmitted to the processor.

15. Input device according to one of the preceding claims, characterized in that the touchpad (1,

16) around a screen, particularly preferably an OLED screen.

6. Input device according to one of the preceding claims, characterized in that a sensor (2, 18-21) is present in the form of a capacitive, a resistive, a piezo sensor or a contact film sensor.

17. Input device according to claim 16, characterized in that the contact film sensor is designed below a flexible touch panel (1) or integrated with it, and has at least two conductor areas (18-20) separated at least in some areas by at least one spacer film (19).

18. Input device according to one of the preceding claims, characterized in that the tactile means (4, 26) is at least one passive tactile means, in particular in the form of a silicone membrane, a metal frog, or a polydome film.

19. Input device according to one of the preceding claims, characterized in that the tactile means (4, 26) is at least one active tactile means, in particular in the form of an electronically controlled plunger.

20. Input device according to one of the preceding claims, characterized in that at least one key area (6) via the

Surface level of the touch panel protrudes or is designed as a recess, in particular concave or convex, preferably circularly symmetrical shapes being provided in the key areas (6).

21. Input device according to one of the preceding claims, characterized in that acoustic feedback is provided in addition to the tactile feedback.

22. Input device according to one of the preceding claims, characterized in that means for illuminating (7, 29, 30) of the touch panel (1) are particularly preferably provided for illuminating the key areas (6).

23. Input device according to claim 22, characterized in that the touch panel (1) is at least partially transparent.

24. Input device according to one of claims 22 or 23, characterized in that the means for lighting (7, 29, 30) are provided as an LED or as an electroluminescent film, optionally in combination with a reflective layer (29).

25. Input device according to one of the preceding claims, characterized in that passive tactile means (4) are arranged on a substantially rigid base (5), which, together with detection means such as a circuit board (9), actuate the tactile means (4). convert it into a signal that a flexible sensor plate (3) is arranged on it, that an x-y or an x-y-z sensor (2) is arranged on it, that an electroluminescent film (30) and/or a decorated film (28) is arranged on it, if necessary , and that a flexible touch panel (1) is arranged on it.

26. Input device according to claim 25, characterized in that the flexible sensor plate (3) and the flexible touch field (1) have a hardness in the range of approximately 20- 70 Shore A, and the flexible sensor plate (3) preferably has a higher hardness, in particular in the range of 70 Shore A, than the flexible touch panel, which in particular has a hardness in the range of 40 Shore A.

27. Input device according to one of claims 25 or 26, characterized in that the flexible sensor plate (3) has a flat surface upwards to the sensor (2) and in the area of the tactile means (4) downwards to the tactile means ( 4) has directed projections or lugs (33), and if necessary supports arranged between the tactile means (4).

(32) to support the flexible sensor plate (3).

28. Input device according to one of the preceding claims, characterized in that the sensor (2) is a resistive sensor and that at least one rigid cap (34), particularly preferably made of plastic, is arranged on the flexible touch panel (1). , which covers areas of the flexible touch panel (1), such caps (34) preferably being arranged in the key areas.

29. Input device according to claim 28, characterized in that the rigid cap (34) is a navigator which can not only be actuated in the z direction, but which can also be used to tilt movements of the cap (34 ) to pass transversal data.

30. Method for operating an input device according to one of the preceding claims, characterized in that the recording of a position report only occurs when the force of the input object perpendicular to the plane of the touch field is less than a defined limit force, preferably less than 2N or more preferably less than 1.5 N, occurs, and that the input in a key area (6) only when the force of the input object perpendicular to the plane of the touch field is more than a defined limit force, preferably more than 2N.

31. The method according to claim 30, characterized in that if the force of the input object in a key area (6) perpendicular to the plane of the touch field is more than a defined limit force, preferably more than 2N, an automatic compensation of position data evaluated before and/or afterwards is carried out.

32. Use of an input device according to one of claims 1-29 as an input device for a mobile phone, a computer, an electronic measuring device, a PDA and mixed forms thereof, particularly preferably for an input area in an automobile.