EP3857344A1 - Berührungssensor, sensoranordnung und display - Google Patents
Berührungssensor, sensoranordnung und displayInfo
- Publication number
- EP3857344A1 EP3857344A1 EP19786448.1A EP19786448A EP3857344A1 EP 3857344 A1 EP3857344 A1 EP 3857344A1 EP 19786448 A EP19786448 A EP 19786448A EP 3857344 A1 EP3857344 A1 EP 3857344A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- touch sensor
- main body
- sensor
- support surface
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of two-dimensional [2D] relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03547—Touch pads, in which fingers can move on a surface
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0362—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of one-dimensional [1D] translations or rotations of an operating part of the device, e.g. scroll wheels, sliders, knobs, rollers or belts
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04106—Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04109—FTIR in optical digitiser, i.e. touch detection by frustrating the total internal reflection within an optical waveguide due to changes of optical properties or deformation at the touch location
Definitions
- the invention relates to a touch sensor, a sensor arrangement with such a touch sensor and a display with such a sensor arrangement.
- Push buttons already touched by a user's finger are typically implemented capacitively these days.
- infrared systems are already known which can recognize an approach to an object such as a display, but are not able to clearly differentiate between a mere proximity and a definite touch.
- this is achieved by a touch sensor, a sensor arrangement and a display according to the respective
- the invention relates to a touch sensor.
- the contact sensor has a main body with at least one bearing surface.
- the touch sensor has a light source which is designed to introduce light into the main body.
- the touch sensor has a light detector which is designed to detect the light emerging from the main body.
- the touch sensor also has a
- Control device On. This is connected to the light detector and is configured to differentiate between a first state and a second state depending on the detected light. In the first state, at least one object rests on the support surface. In the second state, there is no object on the support surface.
- the touch sensor By means of the touch sensor according to the invention, light or an associated optical measurement can be used to detect a support of an object, so that a capacitive measurement can be dispensed with. This avoids interference from covering or adjacent electrically conductive surfaces. As a result, the area of application of the inventive touch sensor is significantly increased, since it can be used, for example, adjacent to electrically conductive decorative surfaces.
- the object can in particular be a finger of a human hand. However, it can also be another object, for example an object specially designed for operation, such as a pen or a glove.
- the use of the touch sensor according to the invention is not restricted to a specific type of objects.
- the control device distinguishes the two states as such, in particular on the basis of predetermined criteria.
- the assignment that the object rests or not is typically a conclusion from the technically recognized states.
- the light can in particular be an infrared light.
- the light source can be designed to emit infrared light and / or the light detector can be designed to detect infrared light. This has the advantage that infrared light is not visible to the human eye and does not represent harmful or harmful radiation. However, other types of light can also be used.
- the main body is preferably transparent to the light introduced by the light source. This can improve the light conduction in the main body.
- a transparent design can in particular be understood to mean that the light introduced by the light source is conducted in the main body without any appreciable absorption.
- a complete total reflection of the light can occur in particular on the support surface if no object rests on the support surface. This corresponds to a typical realization of light guides, with all of the light hitting an area from the inside being reflected back into the light guide.
- the control device can in particular differentiate the states on the basis of a comparison of an intensity of the emerging light with a threshold value.
- the first Condition can be detected at an intensity that is less than the threshold.
- the second state can be recognized, for example, at an intensity which is greater than that
- Threshold is.
- the total reflection described above or its interference with the object lying on it can advantageously be used to distinguish the states of interest.
- the detected intensity is lower, a threshold value being able to be predetermined in a simple manner to distinguish it.
- the main body can extend in particular along a longitudinal direction.
- this can be a longitudinal direction which is perpendicular to a cross section of the main body.
- the cross section can in particular be constant.
- the main body can be realized, for example, in the form of a strip, the design of the touch sensor advantageously being able to detect whether an object is lying on it or not.
- the main body has a first leg in cross section and a second leg angled to it.
- the bearing surface can be formed on the first leg or on the second leg.
- the main body can also have other versions of its cross section, for example a right corner or oval cross section.
- the light source and the light detector can be arranged in particular at opposite ends of the main body in cross section. This can in particular achieve that the light propagates through the cross section of the main body.
- Light source and / or light detector can be along a
- the invention further relates to a sensor arrangement.
- the sensor arrangement has a touch sensor according to the invention. In this regard, all designs and variants described here can be used.
- the sensor arrangement also has a proximity sensor.
- the control device is configured to determine a position in at least one dimension along the support surface by means of the proximity sensor when the first state is recognized.
- the contact sensor can advantageously be combined with a proximity sensor.
- the proximity sensor is typically able to determine a position of an object such as a finger, however, with the blurring with respect to the actual contact mentioned above.
- the touch sensor on the other hand, can reliably detect a touch, which is typically a yes / no decision, i.e. the touch sensor cannot recognize where it was touched.
- the proximity sensor can provide precisely this missing information, as a result of which the touch sensor and the proximity sensor add up to form a synergistically acting unit.
- a bar can be realized in this way in a vehicle, which, when a finger or other object is detected, enables a value to be set over a certain range.
- a volume of media playback can be set.
- the invention further relates to a display with a display unit for displaying graphic information and a sensor arrangement according to the invention.
- a sensor arrangement according to the invention, all designs and variants described herein can be used.
- the main body of the touch sensor is preferably arranged adjacent to the display unit.
- the main body can be used as a control unit provided adjacent to the display unit, which can be used, for example, in the manner described above to set a parameter.
- This can preferably be provided directly adjacent to the display unit or particularly preferably below the display unit, since particularly intuitive operation is possible at this point.
- the proximity sensor can have a number of transmitters and a number of receivers, the transmitters being integrated in the display unit and the receivers being arranged adjacent to the display unit.
- the transmitters can in particular be designed as a plurality of surfaces which emit light, for example infrared light, with only one of these surfaces being connected in succession in succession.
- the transmitters can receive reflected light.
- a position of an object in front of the transmitters can thus be recognized by using a time division multiplex method.
- a proximity sensor can have the advantageous properties already mentioned above.
- Far and near field detection of a proximity sensor such as, for example, an infrared system can be implemented, for example, via an optical fiber.
- This light guide can be covered, for example, by a further, in particular bow-shaped, light guide, which adds an additional function of the finger rest detection.
- This can be, for example, the main body mentioned above.
- the light guide or main body just mentioned can, for example, form a surface of the system or can be attached to a transparent surface by means of optical bonds.
- a seamless design can be used for this.
- the finger rest detection can be based, for example, on the principle of interrupted total reflection. This can mean that an infrared radiation coupled in by the transmitter is guided in the light guide by means of total reflection and strikes the receiver at the other end. If a finger touches the surface of the light guide, radiation is coupled out at this position, which leads to a reduction in the reception energy. The drop in signal strength can be detected.
- a known basic system can thereby be expanded, for example, by a transmitter and a receiver, which can be driven by an existing IC or an existing control device.
- the light guide or the main body can serve as a finger rest, can be infrared-transparent and protect the system from environmental influences.
- Fig. 1 a touch sensor
- Fig. 2 a display.
- Fig. 1 shows a touch sensor 10 according to an exemplary embodiment of the invention in a schematic representation.
- the touch sensor 10 has a main body 20. This is divided into a first leg 22 and a second leg 24. A support surface 26 is formed on the second leg 24, on which an object such as a finger may or may not rest. At the bottom left of the main body 20 there is a light source 30 which is designed to emit infrared light into the main body 20. A light detector 35 for detecting infrared light is arranged on the right side of the main body 20.
- the light beam 37 is from the
- Light source 30 is emitted and, in the example shown, adheres twice to the surface of the main body 20 totally reflected. A total reflection occurs on the contact surface 26.
- the touch sensor 10 also has a control device 40, which is only shown schematically here and is connected to the light detector 35 in a manner not shown in detail.
- the light detector 35 thus reports a measured intensity to the control device 40. If this intensity is above a predetermined threshold value, it is assumed that the total reflection is not disturbed and a condition is therefore present in which no object rests on the support surface 26. If, on the other hand, the intensity is below the threshold value, it is assumed that the total reflection is disturbed, which indicates that an object is resting on the bearing surface 26.
- the control device 40 can thus easily differentiate whether an object rests on the support surface 26 or not.
- Fig. 2 shows schematically a display 100 according to an exemplary embodiment of the invention.
- the display 100 has an show unit 110, which is designed in a manner not shown and described as a flat screen.
- the display 100 also has a sensor arrangement 200 according to an exemplary embodiment of the invention.
- the sensor arrangement 200 has a proximity sensor 210 and a touch sensor 10 as described above.
- the main body 20 with its support surface 26 is arranged directly below the display unit 110.
- the proximity sensor 210 has a total of six transmitters 211, 212, 213, 214, 215, 216, which are designed as areas in the display unit 110. These are designed to emit infrared light. In order to detect this infrared light, the proximity sensor 210 also has a first receiver 217 and a second receiver 218.
- the transmitters 211, 212, 213, 214, 215, 216 are activated alternately in time, so that only one of the transmitters 211, 212, 213, 214, 215, 216 is in operation at short intervals.
- the position of the object in front of the display 100 can be recognized in this way on the basis of the time at which the two receivers 217, 218 detect emitted and reflected infrared radiation. In this way, however, it cannot yet be recognized whether the object, such as a finger, is touching part of the display 100.
- the object touches the bearing surface 26, for example a finger then this contact is recognized in the manner already explained above. However, this alone cannot be used to identify the point at which the object touches the bearing surface 26. However, this can be done by the proximity sensor 210, since it can recognize the position of the object in front of the display 100 in the manner already described.
- a slider functionality can thus be implemented along the support surface 26, ie in the horizontal direction in FIG.
- the production sensor 210 can determine one-dimensionally a position along the horizontal extent of the support surface 26. This can be used, for example, to set a parameter such as a volume.
- control device 40 can be controlled by the control device 40 already described, i.e. this can be used both for the control of the touch sensor 10 and for the control of the proximity sensor 210.
- the latter includes, in particular, the activation of the transmitters 211, 212, 213, 214, 215, 216 using the time-division multiplex method and the reading out of the receivers 217, 218.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018216660.9A DE102018216660A1 (de) | 2018-09-27 | 2018-09-27 | Berührungssensor, Sensoranordnung und Display |
| PCT/EP2019/075529 WO2020064636A1 (de) | 2018-09-27 | 2019-09-23 | Berührungssensor, sensoranordnung und display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3857344A1 true EP3857344A1 (de) | 2021-08-04 |
Family
ID=68210719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19786448.1A Pending EP3857344A1 (de) | 2018-09-27 | 2019-09-23 | Berührungssensor, sensoranordnung und display |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3857344A1 (de) |
| DE (1) | DE102018216660A1 (de) |
| WO (1) | WO2020064636A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19837050A1 (de) * | 1998-08-17 | 2000-02-24 | Gardena Kress & Kastner Gmbh | Flüssigkeitsmeldeeinrichtung |
| US7072533B1 (en) * | 2005-09-26 | 2006-07-04 | Visteon Global Technologies, Inc. | Automotive optical touch sensitive switch method |
| DE102011018234A1 (de) * | 2010-04-21 | 2012-02-02 | Marquardt Gmbh | Bedienvorrichtung |
| EP2749911B1 (de) * | 2012-12-27 | 2020-04-08 | Alpine Electronics, Inc. | Objektpositionserkennungsvorrichtung für eine Automobil-Eingabevorrichtung in einem Fahrzeug |
| EP2975768A1 (de) * | 2014-07-18 | 2016-01-20 | SMR Patents S.à.r.l. | Bedieneinrichtung für Kraftfahrzeuge |
| DE102016103722A1 (de) * | 2015-07-01 | 2017-01-05 | Preh Gmbh | Optische Sensorvorrichtung mit zusätzlicher kapazitiver Sensorik |
-
2018
- 2018-09-27 DE DE102018216660.9A patent/DE102018216660A1/de not_active Withdrawn
-
2019
- 2019-09-23 EP EP19786448.1A patent/EP3857344A1/de active Pending
- 2019-09-23 WO PCT/EP2019/075529 patent/WO2020064636A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018216660A1 (de) | 2020-04-02 |
| WO2020064636A1 (de) | 2020-04-02 |
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Legal Events
| Date | Code | Title | Description |
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| DAX | Request for extension of the european patent (deleted) | ||
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: CONTINENTAL AUTOMOTIVE TECHNOLOGIES GMBH |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 17Q | First examination report despatched |
Effective date: 20231114 |
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| RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: CONTINENTAL AUTOMOTIVE TECHNOLOGIES GMBH |
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| RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: AUMOVIO GERMANY GMBH |