WO2015055560A1 - Dispositif et procédé de détection d'une coordonnée tactile sur une touche non mécanique - Google Patents

Dispositif et procédé de détection d'une coordonnée tactile sur une touche non mécanique Download PDF

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Publication number
WO2015055560A1
WO2015055560A1 PCT/EP2014/071850 EP2014071850W WO2015055560A1 WO 2015055560 A1 WO2015055560 A1 WO 2015055560A1 EP 2014071850 W EP2014071850 W EP 2014071850W WO 2015055560 A1 WO2015055560 A1 WO 2015055560A1
Authority
WO
WIPO (PCT)
Prior art keywords
key
sensor
mechanical
touch
sensor surfaces
Prior art date
Application number
PCT/EP2014/071850
Other languages
German (de)
English (en)
Inventor
Hans-Martin Dannegger
Original Assignee
Continental Automotive Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Publication of WO2015055560A1 publication Critical patent/WO2015055560A1/fr

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
    • G06F3/0202—Constructional details or processes of manufacture of the input device
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/96—Touch switches
    • H03K17/9618—Touch switches using a plurality of detectors, e.g. keyboard
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/96—Touch switches
    • H03K17/962—Capacitive touch switches
    • H03K17/9622—Capacitive touch switches using a plurality of detectors, e.g. keyboard
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/96—Touch switches
    • H03K2217/9607—Capacitive touch switches
    • H03K2217/960705—Safety of capacitive touch and proximity switches, e.g. increasing reliability, fail-safe
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/96—Touch switches
    • H03K2217/9607—Capacitive touch switches
    • H03K2217/960785—Capacitive touch switches with illumination

Definitions

  • the invention relates to a non-mechanical key and a method for determining a touch coordinate on such a key.
  • the invention further relates to a computer program for carrying out the method.
  • Touch-sensitive areas that sit ⁇ be a key function must have a safe loading ⁇ rrittungserkennung. In particular, when these keys are close together, it must be recognized which key is ultimately pressed. For this purpose, usually one sensor per key is used and z. B. evaluated its intensity. This provides a statement as to whether the key has been touched.
  • FIGS. 1 and 2 Examples of sensor keys with one sensor per key are shown in FIGS. 1 and 2.
  • a substantially square area is shown, which can be used completely as a sensor surface ⁇ 10th
  • FIG. 2 shows a ring which serves as a sensor surface 10.
  • Such non-mechanical keys can only detect very limited where exactly a touch has taken place.
  • a contact on the edge of one of the sensor areas 10 may lead to a signal indicative ⁇ records the button as pressed.
  • An object of the invention is to provide a non-mechanical key and associated method by which it can be more reliably determined whether the key has been pressed or not.
  • a non-mechanical key has a key surface and a plurality of sensor surfaces.
  • the key surface can be sensitive to touch, at least in the area of the sensor surfaces.
  • the sensor surfaces may be arranged at the edges of the key surface.
  • an area and a coordinate in the center (center of gravity) of that area on the key can be found, which identifies the location of the touch on the key area.
  • the now determined coordinate provides an additional criterion for qualifying and delimiting the non-mechanical key.
  • the non-mechanical button may have illumination for illuminating the button surface. It can be provided, in particular to illuminate a surface area of the key surface, which is arranged between the sensor surfaces.
  • the touch-sensitive surface may be translucent and a light source, such as an LED, whose light illuminates the key surface may be disposed on the back of the key surface.
  • the light source may also comprise a plurality of pixels, by means of which even complex representations on the key surface are possible.
  • the key surface of the non-mechanical key may be rectangular.
  • the sensor surfaces extend along the edges of the key surface, leaving a central surface area free, for example for a key symbol.
  • the sensor surfaces extend from one corner of the key surface along the two adjacent edges of the key surface.
  • the key surface may be rounded.
  • the key area and sensor shapes may vary depending on the sensor system used. The design of the key surface and the sensor shapes can thus be adapted to a desired application.
  • the non-mechanical button may have two, three, four or more sensor surfaces. Many sensor surfaces allow a determination of whether a
  • the resolution i. H. the accuracy of determining a touch coordinate can be increased.
  • the non-mechanical key further has a processing unit which is suitable for processing the signals of the sensor surfaces.
  • a keypad may be provided with a plurality of non-mechanical keys. In a plurality of non-mechanical buttons in one
  • a method for determining a touch coordinate on a non-mechanical key may sorhos the step of detecting a touch intensity of at least two Sen ⁇ and the step of determining a touch coordinate in dependence on the detected at each individual sensor surface contact intensity and the position of the sensor surfaces have.
  • the method can detect the touch intensity of at least two sensor surfaces and use for. B. to determine the position of the touch via a Schwerpunkbetician.
  • each sensor surface can be assumed to be known within a coordinate system.
  • the Berüh ⁇ approximately intensity can be determined for example on the basis of a Sig ⁇ nalNOR an output from a sensor surface signal.
  • the sensors used may be selected so that a contact in the immediate vicinity of the sensor triggers a weak signal.
  • the method may further determine whether the touch coordinate is within a predetermined coordinate range and generating a signal indicating that the key is considered pressed when the touch coordinate is within the predetermined coordinate range.
  • a downstream system can activate and / or execute an associated function in a context-dependent manner.
  • a computer program that performs all the steps of a method when running on a controller of a device as described above.
  • a corresponding computer program is preferably loaded into a main memory of a control unit.
  • the control unit or a data processor is thus equipped to carry out the method according to the invention.
  • Such a computer program may be stored on a computer readable medium such as a CD-ROM.
  • the computer program may also be provided over a network, such as the Internet, and may be downloaded into the memory of the controller from that network.
  • Figures 1 and 2 are illustrations of sensor surfaces according to the prior art.
  • Figure 3 is a schematic representation of a single non-mechanical key according to an embodiment of the invention.
  • Figure 4 is a schematic representation of a
  • FIG. 5 to 7 are schematic representations of
  • Fig. 8 is a flowchart for schematically
  • FIG. 3 is a schematic representation of an embodiment according to the invention.
  • FIG. 3 shows a key surface 10 which is surrounded by a general surface 30.
  • the general area 30 could be a glass surface
  • the Tas ⁇ ten Design 10 delimited by the sensor surfaces 11-14 of the general surface thirtieth
  • the key surface 10 is here shown slightly larger than the outer edge of the sensor surfaces 11-14. Between the respective sensor surfaces 11, 12, 13 and 14 gaps are shown.
  • the sensor surfaces 11-14 can thus generate a signal independently of one another, as soon as the sensor surface itself or the key surface near the sensor surface is touched.
  • a contact surface 20 with a center of gravity 21 is shown in FIG.
  • An outer edge of the Berüh approximately ⁇ surface 20 is located on the sensor surface 14.
  • FIG. 1 a coordinate system with an X coordinate and a Y coordinate is shown in FIG.
  • the touch ⁇ surface and in particular the center of gravity 21 of the contact surface 20 can be indicated in terms of X and Y coordinates.
  • the sensor signal of the sensor surface 14 could be comparable to the situation illustrated in FIG. 3 if the center of gravity 21 of the contact surface 20 were located outside the key surface 10. Such a situation is shown in FIG. As long as only a single non-mechanical key is provided with a key surface 10 on a general surface 30, a touch substantially outside the key surface 10 may also result in triggering of the key.
  • a keypad is shown with two non-mechanical keys which are arranged side by side, so that a contact between the two keys could cause tripping of both keys, as indicated by the contact surface ⁇ 20th
  • a processing ⁇ unit 50 which is connected to the keys, and which is adapted to process the signals of the individual sensor surfaces 11, 12, 13, 14 and 15, 16, 17, 18.
  • the processing unit 50 would receive a touch signal from both the sensor surface 14 and the sensor surface 15.
  • the processing unit 50 can determine that the contact between the two keys has taken place, and thus can not pass a unique key signal. In particular, in such a situation, an advantage of the embodiments according to the invention becomes apparent.
  • Figures 5, 6 and 7 show further design variants of non-mechanical buttons.
  • FIG. 6 differs from the embodiment shown in FIG. 3, in particular in that the sensor surfaces 11, 12, 13 and 14 are not provided at the corners and thus at two edges but only along one edge of the key surface 10 are.
  • FIG. 6 shows by way of example a lighting 40 in the center of the key surface 10.
  • a flat, diffuse illumination of the key surface can be realized or even a luminous, concrete symbol can be displayed.
  • the illumination Be ⁇ 40 can also be realized by a plurality of lighting elements, such as LEDs, wherein the lighting elements do not need to be located in the middle of the key surface 10.
  • illumination 40 may also be provided in each of the other embodiments.
  • Figure 7 shows an embodiment with a circular
  • Button surface 10 and corresponding curved sensor surfaces 11, 12, 13 and 14th It is noted that a key area may have an edge length of approximately one lense. Further, the adjacent edges of two key surfaces may be located 7.5mm apart.
  • Fig. 8 is a flowchart showing principally the steps of a method of determining a touch coordinate. It is noted that the described steps are main steps, whereby these main steps can be subdivided and subdivided. In addition, further substeps may be provided between the main steps. Therefore, a sub-step is only mentioned if this step is important for understanding the principle of the method according to the invention.
  • Step S1 marks the beginning of a method according to the invention.
  • step S1 the touch intensity of a sensor is detected. As indicated by the arrow returning to step S1, this step can be carried out several times, in particular when a plurality of sensor surfaces emit a touch signal.
  • a touch coordinate is determined at step S2, e.g. B. via a mathematical center of gravity calculation and / or a calculation of a probability with which a Tas ⁇ ten Design was touched in a certain area.
  • step S3 the determined area or the determined contact coordinate is compared with a predetermined coordinate area.
  • the predetermined coordinate area may in particular be the key area itself. The comparison checks whether the determined contact coordinate lies within the key area.
  • the process continues in step S4, that is, there is generated a signal which represents that the non-mechanical ⁇ specific key is pressed.
  • a function may be activated or triggered by a downstream system in step S5. If the comparison in step S3 shows that a touch did not occur within the key area, the process is ended.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

L'invention concerne un dispositif et un procédé de détection d'une coordonnée tactile sur une touche non mécanique comprenant une surface de touche et une pluralité de surfaces de détection. La surface de touche peut être sensible au toucher au moins dans la zone des surfaces de détection. En outre, les surfaces de détection peuvent être disposées sur les bords de la surface de touche.
PCT/EP2014/071850 2013-10-14 2014-10-13 Dispositif et procédé de détection d'une coordonnée tactile sur une touche non mécanique WO2015055560A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013220744.1 2013-10-14
DE201310220744 DE102013220744A1 (de) 2013-10-14 2013-10-14 Vorrichtung und Verfahren zur Ermittlung einer Berührungskoordinate auf einer nicht-mechanischen Taste

Publications (1)

Publication Number Publication Date
WO2015055560A1 true WO2015055560A1 (fr) 2015-04-23

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ID=51794855

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/071850 WO2015055560A1 (fr) 2013-10-14 2014-10-13 Dispositif et procédé de détection d'une coordonnée tactile sur une touche non mécanique

Country Status (2)

Country Link
DE (1) DE102013220744A1 (fr)
WO (1) WO2015055560A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005049856A1 (de) * 2005-10-18 2007-04-19 Benq Mobile Gmbh & Co. Ohg Tastatur für mobile Endgeräte
US20090107737A1 (en) * 2007-10-28 2009-04-30 Joesph K Reynolds Multiple-sensor-electrode capacitive button
EP2444879A2 (fr) * 2010-10-19 2012-04-25 Hosiden Corporation Appareil d'entrée de coordonnées tactiles, panneau tactile et dispositifs électroniques en disposant

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005049856A1 (de) * 2005-10-18 2007-04-19 Benq Mobile Gmbh & Co. Ohg Tastatur für mobile Endgeräte
US20090107737A1 (en) * 2007-10-28 2009-04-30 Joesph K Reynolds Multiple-sensor-electrode capacitive button
EP2444879A2 (fr) * 2010-10-19 2012-04-25 Hosiden Corporation Appareil d'entrée de coordonnées tactiles, panneau tactile et dispositifs électroniques en disposant

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